chore: centralize storage of submodule names (#36018)

### Reason for this change

Currently, `.jsiirc.json` files in aws-cdk-lib submodules contain historical naming deviations (e.g., `Amazon.CDK.AWS.Sagemaker` instead of the standard `Amazon.CDK.AWS.SageMaker`). These files are manually maintained and scattered across hundreds of subdirectories, making it:

- **Difficult to discover** what deviations exist and why
- **Risky to change** because there's no central source of truth
- **Hard to maintain consistency** when adding new modules
- **Impossible to audit** without checking every subdirectory

This creates technical debt and makes it harder to evolve the codebase.

### Description of changes

Centralizes all jsii target configurations into a single `scope-map.json` file that serves as the source of truth. The submodule generation script now always regenerates `.jsiirc.json` files from this central configuration, ensuring consistency and making deviations explicit and auditable.

Supporting changes:
- Created `module-topology.ts` to manage the scope map
- Moved jsii utilities from `util/pkglint.ts` to `util/jsii.ts`
- Removed unused `cfn2ts` CLI tool
- Updated all imports to use the new module topology exports

This makes historical deviations visible in one place and prevents future drift.

### Describe any new or updated permissions being added

No new permissions are being added.

### Description of how you validated changes

- Verified that the scope-map.json correctly captures all existing module configurations
- Confirmed that regenerated .jsiirc.json files match the expected format
- Ensured all imports and type references were updated correctly

Basically the proof that this works is that (aside from `scope-map.json`) only codegen files have changed. In particular `jsii-diff` doesn't report anything and no `.jsiirc.json` files changed.

### Checklist
- [x] My code adheres to the [CONTRIBUTING GUIDE](https://github.com/aws/aws-cdk/blob/main/CONTRIBUTING.md) and [DESIGN GUIDELINES](https://github.com/aws/aws-cdk/blob/main/docs/DESIGN_GUIDELINES.md)

----

*By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license*

Author: mrgrain

packages/aws-cdk-lib/scripts/codegen.ts

@@ -1,6 +1,7 @@
 import * as path from 'node:path';
+import { naming, topo } from '@aws-cdk/spec2cdk';
+import { generateAll } from '@aws-cdk/spec2cdk/lib/cfn2ts';
 import * as fs from 'fs-extra';
-import { generateAll, ModuleMap } from './codegen';
 import submodulesGen from './submodules';
 
 const awsCdkLibDir = path.join(__dirname, '..');
@@ -25,23 +26,11 @@ async function main() {
   }));
 
   await updateExportsAndEntryPoints(generated);
-  await writeScopeMap(generated);
+  await topo.writeModuleMap(generated);
   await submodulesGen(generated, awsCdkLibDir);
 }
 
-async function writeScopeMap(modules: ModuleMap) {
-  const newScopeMap = Object.entries(modules)
-    .sort(([modA], [modB]) => modA.localeCompare(modB))
-    .reduce((scopeMap, [moduleName, { scopes }]) => {
-      return {
-        ...scopeMap,
-        [moduleName]: scopes,
-      };
-    }, {});
-  await fs.writeJson(scopeMapPath, newScopeMap, { spaces: 2 });
-}
-
-async function updateExportsAndEntryPoints(modules: ModuleMap) {
+async function updateExportsAndEntryPoints(modules: topo.ModuleMap) {
   const pkgJson = await fs.readJson(pkgJsonPath);
 
   const indexStatements = new Array<string>();
@@ -53,7 +42,7 @@ async function updateExportsAndEntryPoints(modules: ModuleMap) {
   for (const [moduleName, { definition }] of Object.entries(modules)) {
     const moduleConfig = {
       name: definition?.moduleName ?? moduleName,
-      submodule: definition?.submoduleName ?? moduleName.replace(/-/g, '_'),
+      submodule: definition?.submoduleName ?? naming.submoduleSymbolFromName(moduleName),
     };
 
     const exportName = `./${moduleConfig.name}`;