fix(@schematics/angular): remove unused app tsconfig outDir

[cyphercodes]

PR Checklist

Please check to confirm your PR fulfills the following requirements:

• The commit message follows our guidelines: https://github.com/angular/angular-cli/blob/main/CONTRIBUTING.md#-commit-message-guidelines
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

• Bugfix
• Feature
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
• Build related changes
• CI related changes
• Documentation content changes
• Other... Please describe:

What is the current behavior?

New applications generated by the application schematic include an outDir entry in tsconfig.app.json. This can cause a TypeScript configuration lint warning for projects generated by ng new.

Issue Number: Fixes #33360

What is the new behavior?

Generated application tsconfig.app.json files no longer include the unused outDir compiler option.

Does this PR introduce a breaking change?

• Yes
• No

Other information

Docs are not updated because this only removes an unused generated TypeScript compiler option.

Verification:

• pnpm exec bazelisk test //packages/schematics/angular:test --test_output=errors
• git diff --check

[gemini-code-assist]

Code Review

This pull request removes the outDir compiler option from the tsconfig.app.json.template file used in the Angular application schematic. It also updates the corresponding unit tests in index_spec.ts to assert that compilerOptions.outDir is undefined. There are no review comments, so I have no feedback to provide.