fix(cli): include generic auth credentials in permission checks

[nkoorty]

Motivation

• Active-credential filtering omitted credentials selected via node parameters like genericAuthType, which allowed HTTP Request nodes using generic credential mode to bypass pre-execution project-sharing checks.
• The change restores correct enforcement so credentials chosen at runtime are included in the pre-execution permission check.

Description

• Add genericAuthType to the set of active credential types in CredentialsPermissionChecker.getActiveCredentialTypes so generic-mode credentials are treated like nodeCredentialType and validated before execution.
• Ensure mapCredIdsToNodes will include credential IDs for types produced by genericAuthType through the existing active-type filtering.
• Add a regression test should check generic auth credential type selected by genericAuthType to packages/cli/src/executions/pre-execution-checks/__tests__/credentials-permission-checker.test.ts verifying the selected generic credential is passed to accessibility checks.

Testing

• Ran a full repository build with pnpm build > build.log 2>&1, which completed (build output captured in build.log).
• Attempted the targeted unit test with pnpm test for the modified test file, but the Jest run failed in this environment due to missing built workspace runtime/test modules (e.g. @n8n/db, @n8n/backend-test-utils) rather than due to assertion failures.
• Ran pnpm eslint and pnpm typecheck in packages/cli, which produced only lint warnings and passed type checking with tsc --noEmit.

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Codex Task