Expose source URL and branch via annotation

[MartinBasti]

Adding annotations to PR to expose source url and source branch from PRs. While PAC allows too use source-url and source-branch in templates, this information was not propagated into PLR metadata and was hard to identify PLRs trigerred from forks.

Resolves: #1693

Changes

Submitter Checklist

• [x] 📝 Please ensure your commit message is clear and informative. For guidance on crafting effective commit messages, refer to the How to write a git commit message guide. We prefer the commit message to be included in the PR body itself rather than a link to an external website (ie: Jira ticket).

• [ ] ♽ Before submitting a PR, run make test lint to avoid unnecessary CI processing. For an even more efficient workflow, consider installing pre-commit and running pre-commit install in the root of this repository.

• [ ] ✨ We use linters to maintain clean and consistent code. Please ensure you've run make lint before submitting a PR. Some linters offer a --fix mode, which can be executed with the command make fix-linters (ensure markdownlint and golangci-lint tools are installed first).

• [ ] 📖 If you're introducing a user-facing feature or changing existing behavior, please ensure it's properly documented.

• [ ] 🧪 While 100% coverage isn't a requirement, we encourage unit tests for any code changes where possible.

• [ ] 🎁 If feasible, please check if an end-to-end test can be added. See README for more details.

• [ ] 🔎 If there's any flakiness in the CI tests, don't necessarily ignore it. It's better to address the issue before merging, or provide a valid reason to bypass it if fixing isn't possible (e.g., token rate limitations).

[chmouel]

/ok-to-test

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 64.54%. Comparing base (9dcbe19) to head (500835d). Report is 1 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #1699 +/- ## ======================================= Coverage 64.54% 64.54% ======================================= Files 143 143 Lines 11098 11100 +2 ======================================= + Hits 7163 7165 +2 Misses 3413 3413 Partials 522 522 ```

:umbrella: View full report in Codecov by Sentry.
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[MartinBasti]

I'm not sure if I broke the e2e test, if yes, then I failed to find why

[chmouel]

Thanks @MartinBasti 👏🏻