Disable expensive and scheduled workflows on personal forks

[dewitt]

Summary

This PR adds the if: github.repository == 'google-gemini/gemini-cli' condition to various workflow jobs to prevent them from running on personal forks of the repository.

Details

Many CI/CD workflows, especially those that are scheduled, triggered on tags, or use custom runners (like gemini-cli-ubuntu-16-core), currently attempt to run on every fork. This causes several issues:

• Action Minute Consumption: Contributors may inadvertently use their personal Action minute quotas on expensive or scheduled runs intended only for the main repository.
• Indefinite Queueing: Jobs using custom runners will sit in a "Queued" state indefinitely on forks since those runners are only available in the upstream organization.
• Noisy Failures: Workflows relying on secrets (like GEMINI_API_KEY) consistently fail on forks, resulting in unnecessary error notifications.

This PR adds the repository check to the following workflows:

• chained_e2e.yml
• ci.yml (various jobs including skipper and final check)
• deflake.yml
• evals-nightly.yml
• docs-page-action.yml
• docs-rebuild.yml
• smoke-test.yml
• verify-release.yml
• release-notes.yml
• release-manual.yml
• release-sandbox.yml
• release-change-tags.yml
• release-rollback.yml
• gemini-scheduled-stale-issue-closer.yml
• label-backlog-child-issues.yml
• label-workstream-rollup.yml
• trigger_e2e.yml

Related Issues

Fixes #20447

How to Validate

Since these changes are repository-level conditions, they can be validated by:

1. Pushing these changes to a personal fork.
2. Observing that the modified workflows (e.g., ci.yml, smoke-test.yml) are either skipped or their jobs are correctly filtered by the if condition.

Pre-Merge Checklist

• Updated relevant documentation and README (if needed)
• Added/updated tests (if needed)
• Noted breaking changes (if any)
• Validated on required platforms/methods:
  • MacOS
    • npm run
    • npx
    • Docker
    • Podman
    • Seatbelt
  • Windows
    • npm run
    • npx
    • Docker
  • Linux
    • npm run
    • npx
    • Docker

[gemini-code-assist]

Note

Gemini is unable to generate a summary for this pull request due to the file types involved not being currently supported.