Tests do not create issues if the `shim` step fails

[ianlewis]

Most e2e tests check for needs.shim.outputs.continue == 'yes' but don't check if the shim job actually succeeded. We should create an issue if the shim step fails. This goes for the push or dispatch steps as well.

• .github/workflows/e2e.container.push.branch1.default.slsa3.yml
• .github/workflows/e2e.go.tag.main.config-ldflags-noassets.slsa3.yml
• .github/workflows/e2e.container.tag.main.default.slsa3.yml
• .github/workflows/e2e.container-based.tag.main.default.slsa3.yml
• .github/workflows/e2e.go.tag.main.adversarial-asset-provenance.slsa3.yml
• .github/workflows/e2e.generic.tag.main.assets.slsa3.yml
• .github/workflows/e2e.go.push.branch1.config-ldflags.slsa3.yml
• .github/workflows/e2e.go.tag.branch1.config-ldflags-assets.slsa3.yml
• .github/workflows/e2e.go.release.main.config-ldflags-noassets.slsa3.yml
• .github/workflows/e2e.go.tag.main.config-ldflags-assets.slsa3.yml
• .github/workflows/e2e.generic.push.branch1.default.slsa3.yml
• .github/workflows/e2e.generic.tag.main.annotated.slsa3.yml
• .github/workflows/e2e.go.release.main.config-ldflags-assets.slsa3.yml
• .github/workflows/e2e.go.tag.main.adversarial-asset-binary.slsa3.yml
• .github/workflows/e2e.nodejs.release.main.default.slsa3.yml
• .github/workflows/e2e.container.tag.main.gcp-workload-identity.slsa3.yml
• .github/workflows/e2e.container.tag.branch1.default.slsa3.yml
• .github/workflows/e2e.nodejs.push.branch1.default.slsa3.yml
• .github/workflows/e2e.go.tag.main.config-ldflags-assets-tag.slsa3.yml
• .github/workflows/e2e.nodejs.create.main.default.slsa3.yml
• .github/workflows/e2e.go.tag.main.config-ldflags-assets-prerelease-tag.slsa3.yml
• .github/workflows/e2e.container.tag.main.registry-username-secret.yml
• .github/workflows/e2e.generic.release.main.default.slsa3.yml
• .github/workflows/e2e.generic.tag.branch1.default.slsa3.yml
• .github/workflows/e2e.generic.tag.main.goreleaser-assets-multi-subjects.slsa3.yml
• .github/workflows/e2e.go.workflow_dispatch.branch1.config-ldflags.slsa3.yml
• .github/workflows/e2e.go.tag.main.config-ldflags-assets-draft-tag.slsa3.yml
• .github/workflows/e2e.go.release.main.config-ldflags-assets-tag.slsa3.yml
• .github/workflows/e2e.nodejs.tag.main.default.slsa3.yml