Drop non-unique Cleanup logic from expect step (#516)

Summary:
Pull Request resolved: #516

To enable actual clean ups and prevent errors like

```
ERROR   failed to run command:
        could not load TTP at /home/nesusvet/security-ttpcode/ttps/infra/tupperware/ssh-to-container-as-root.yaml:
        could not parse action for step "start-tupperware-container": action fields did not match any valid action type
```

Changes pretty radical but I don't see why we need a custom implementation of cleanup logic for expect step

Consider small change to the [expect.yaml](https://www.internalfb.com/code/fbsource/fbcode/security/redteam/purple_team/ttpforge/example-ttps/actions/expect/expect.yaml) example TTP
```
hg d
 diff --git a/fbcode/security/redteam/purple_team/ttpforge/example-ttps/actions/expect/expect.yaml b/fbcode/security/redteam/purple_team/ttpforge/example-ttps/actions/expect/expect.yaml
 --- a/fbcode/security/redteam/purple_team/ttpforge/example-ttps/actions/expect/expect.yaml
+++ b/fbcode/security/redteam/purple_team/ttpforge/example-ttps/actions/expect/expect.yaml
@@ -26,3 +26,4 @@
           response: "John"
         - prompt: "Enter your age:"
           response: "30"
+      cleanup: echo "Done"
```

Try to run it on master and see NO CLEANUP instructions executed:
```
 buck run security/redteam/purple_team/ttpforge:ttpforge -- run security/redteam/purple_team/ttpforge/example-ttps/actions/expect/expect.yaml
File changed: fbcode//security/redteam/purple_team/ttpforge/example-ttps/actions/expect/expect.yaml
Buck UI: https://www.internalfb.com/buck2/a008be5d-79d8-4591-960a-64fafbc10a44
Network: Up: 0B  Down: 0B
Jobs completed: 4. Time elapsed: 0.0s.
BUILD SUCCEEDED
INFO    RUNNING TTP: Complex Expect Step with Python Script
INFO    ----------------------------------------
INFO    Executing Step #1: "create_python_script"
INFO    ----------------------------------------
INFO    Executing Step #2: "run_expect_script"
Enter your name:
John
Enter your age:
30
Hello John, you are 30 years old!
INFO    ----------------------------------------
INFO    All TTP steps completed successfully!
INFO    ========================================
INFO    CLEANING UP 2 steps of TTP: "Complex Expect Step with Python Script"
INFO    ----------------------------------------
INFO    Cleaning Up Step #2: "run_expect_script"
INFO    No Cleanup Action Defined for Step run_expect_script
INFO    ----------------------------------------
INFO    Cleaning Up Step #1: "create_python_script"
INFO    No Cleanup Action Defined for Step create_python_script
INFO    ----------------------------------------
INFO    Finished Cleanup Successfully
```

Differential Revision: D64108097

fbshipit-source-id: 2ab395b393b88ebfd0f5dd647cd75f34fce52b97

Author: inesusvet

example-ttps/actions/expect/expect.yaml

@@ -26,3 +26,5 @@ steps:
           response: "John"
         - prompt: "Enter your age:"
           response: "30"
+    cleanup:
+      inline: echo "Wipe it"

pkg/blocks/expectstep.go

@@ -30,7 +30,6 @@ import (
 	"github.com/Netflix/go-expect"
 	"github.com/facebookincubator/ttpforge/pkg/logging"
 	"github.com/facebookincubator/ttpforge/pkg/outputs"
-	"go.uber.org/zap"
 )
 
 // ExpectStep represents an expect command.
@@ -52,7 +51,6 @@ type ExpectStep struct {
 	Executor       string                  `yaml:"executor,omitempty"`
 	Expect         *ExpectSpec             `yaml:"expect,omitempty"`
 	Environment    map[string]string       `yaml:"env,omitempty"`
-	CleanupStep    string                  `yaml:"cleanup,omitempty"`
 	Outputs        map[string]outputs.Spec `yaml:"outputs,omitempty"`
 }
 
@@ -263,40 +261,6 @@ func (s *ExpectStep) prepareCommand(ctx context.Context, execCtx TTPExecutionCon
 	return cmd
 }
 
-// Cleanup runs the cleanup command if specified.
-//
-// **Parameters:**
-//
-// execCtx: Execution context containing environment variables and working
-// directory.
-//
-// **Returns:**
-//
-// *ActResult: A pointer to the action result.
-// error: An error if cleanup fails.
-func (s *ExpectStep) Cleanup(execCtx TTPExecutionContext) (*ActResult, error) {
-	if s.CleanupStep == "" {
-		return &ActResult{}, nil
-	}
-
-	logging.L().Info("Running cleanup step")
-
-	envAsList := os.Environ()
-	cmd := s.prepareCommand(context.Background(), execCtx, envAsList, s.CleanupStep)
-
-	cmd.Stdout = os.Stdout
-	cmd.Stdin = os.Stdin
-	cmd.Stderr = os.Stderr
-
-	if err := cmd.Run(); err != nil {
-		logging.L().Error("Failed to run cleanup command", zap.Error(err))
-		return nil, fmt.Errorf("failed to run cleanup command: %w", err)
-	}
-
-	logging.L().Info("Cleanup step completed successfully")
-	return &ActResult{}, nil
-}
-
 // CanBeUsedInCompositeAction enables this action to be used in a composite
 // action.
 //

pkg/blocks/expectstep_test.go

@@ -370,35 +370,6 @@ steps:
       responses:
         - prompt: "Enter a number:"
           response: "30"
-`,
-		},
-		{
-			name: "Test ExpectStep with CleanupStep",
-			script: `
-print("Enter your name:")
-name = input()
-print(f"Hello, {name}!")
-print("Enter your age:")
-age = input()
-print(f"You are {age} years old.")
-`,
-			content: `
-steps:
-  - name: run_expect_script
-    description: "Run an expect script to interact with the command."
-    expect:
-      inline: |
-        python3 interactive.py
-      chdir: "/tmp"
-      responses:
-        - prompt: "Enter your name:"
-          response: "John"
-        - prompt: "Enter your age:"
-          response: "30"
-      cleanup: |
-        pwd
-        cat interactive.py
-        rm interactive.py
 `,
 		},
 	}
@@ -529,58 +500,6 @@ steps:
 				assert.Contains(t, normalizedOutput, actualDir)
 				assert.Contains(t, normalizedOutput, expectedSubstring2)
 			}
-
-			if tc.name == "Test ExpectStep with CleanupStep" {
-				// Mock the command execution
-				execCtx := NewTestTTPExecutionContext(tempDir)
-				console, err := expect.NewConsole(expectNoError(t), sendNoError(t), expect.WithStdout(os.Stdout), expect.WithStdin(os.Stdin))
-				require.NoError(t, err)
-				defer console.Close()
-
-				cmd := exec.Command("sh", "-c", "python3 "+scriptPath)
-				cmd.Stdin = console.Tty()
-				cmd.Stdout = console.Tty()
-				cmd.Stderr = console.Tty()
-
-				if expectStep.Chdir != "" {
-					cmd.Dir = expectStep.Chdir
-				}
-
-				err = cmd.Start()
-				require.NoError(t, err)
-
-				done := make(chan struct{})
-
-				// simulate console input
-				go func() {
-					defer close(done)
-					time.Sleep(1 * time.Second)
-					console.SendLine("John")
-					time.Sleep(1 * time.Second)
-					console.SendLine("30")
-					time.Sleep(1 * time.Second)
-					console.Tty().Close() // Close the Tty to signal EOF
-				}()
-
-				_, err = expectStep.Execute(execCtx)
-				require.NoError(t, err)
-				<-done
-
-				output, err := console.ExpectEOF()
-				require.NoError(t, err)
-
-				// Check the output of the command execution
-				normalizedOutput := strings.ReplaceAll(output, "\r\n", "\n")
-				expectedSubstring1 := "Hello, John!\n"
-				expectedSubstring2 := "You are 30 years old.\n"
-				assert.Contains(t, normalizedOutput, expectedSubstring1)
-				assert.Contains(t, normalizedOutput, expectedSubstring2)
-
-				// Execute cleanup step
-				result, err := expectStep.Cleanup(execCtx)
-				require.NoError(t, err)
-				assert.NotNil(t, result)
-			}
 		})
 	}
 }
@@ -698,71 +617,6 @@ func (m MockCommandExecutor) Run() error {
 	return m.runFunc()
 }
 
-func TestCleanup(t *testing.T) {
-	testCases := []struct {
-		name          string
-		cleanupStep   string
-		mockRunOutput string
-		mockRunError  string
-		wantErr       bool
-	}{
-		{
-			name:          "No Cleanup Step",
-			cleanupStep:   "",
-			mockRunOutput: "",
-			mockRunError:  "",
-			wantErr:       false,
-		},
-		{
-			name:          "Successful Cleanup",
-			cleanupStep:   "echo 'cleaning up'",
-			mockRunOutput: "cleaning up",
-			mockRunError:  "",
-			wantErr:       false,
-		},
-		{
-			name:          "Failed Cleanup",
-			cleanupStep:   "exit 1",
-			mockRunOutput: "",
-			mockRunError:  "exit status 1",
-			wantErr:       true,
-		},
-	}
-
-	for _, tc := range testCases {
-		t.Run(tc.name, func(t *testing.T) {
-			s := &ExpectStep{
-				CleanupStep: tc.cleanupStep,
-				Executor:    "sh",
-			}
-
-			// Mock execCommand for testing
-			execCommand = func(ctx context.Context, name string, args ...string) *exec.Cmd {
-				cs := []string{"-test.run=TestHelperProcess", "--", name}
-				cs = append(cs, args...)
-				cmd := exec.CommandContext(ctx, os.Args[0], cs...)
-				cmd.Env = append(os.Environ(),
-					"GO_WANT_HELPER_PROCESS=1",
-					fmt.Sprintf("MOCK_RUN_OUTPUT=%s", tc.mockRunOutput),
-					fmt.Sprintf("MOCK_RUN_ERROR=%s", tc.mockRunError),
-				)
-				return cmd
-			}
-
-			execCtx := TTPExecutionContext{
-				Vars: &TTPExecutionVars{
-					WorkDir: ".",
-				},
-			}
-
-			_, err := s.Cleanup(execCtx)
-			if (err != nil) != tc.wantErr {
-				t.Errorf("Cleanup() error = %v, wantErr %v", err, tc.wantErr)
-			}
-		})
-	}
-}
-
 func TestHelperProcess(*testing.T) {
 	if os.Getenv("GO_WANT_HELPER_PROCESS") != "1" {
 		return