[infra] Fix release pipeline

[Kielek]

Fixes #6840
The comments.login is otelbot-dotnet instead of app/otelbot-dotnet

Changes

Problem

The release automation was failing with the error Could not find package push comment on pr when running the /PushPackages command on PR #6839.

Root cause: The GitHub API returns different author.login values for GitHub Apps depending on context:

• PR author: app/otelbot-dotnet (includes app/ prefix)
• Comment author: otelbot-dotnet (no prefix)

The scripts were using the same variable (expectedPrAuthorUserName) to match both PR authors and comment authors, causing the comment author check to fail.

Solution

Introduced a separate parameter expectedCommentAuthorUserName to correctly match comment authors.

Changes

New GitHub variable required:

• AUTOMATION_APPLICATION_LOGIN = otelbot-dotnet

Files modified:

File	Change
.github/workflows/automation.yml	Added application-login output
.github/workflows/publish-packages-1.0.yml	Pass expectedCommentAuthorUserName to TryPostPackagesReadyNoticeOnPrepareReleasePullRequest
.github/workflows/post-release.yml	Pass expectedCommentAuthorUserName to both PushPackagesPublishReleaseUnlockAndPostNoticeOnPrepareReleasePullRequest and TryPostReleasePublishedNoticeOnPrepareReleasePullRequest
build/scripts/post-release.psm1	Added expectedCommentAuthorUserName parameter to 3 functions and use it for comment author matching

Merge requirement checklist

• CONTRIBUTING guidelines followed (license requirements, nullable enabled, static analysis, etc.)
• [ ] Unit tests added/updated
• [ ] Appropriate CHANGELOG.md files updated for non-trivial changes
• [ ] Changes in public API reviewed (if applicable)

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 86.90%. Comparing base (164d8a5) to head (36bd10c).
⚠️ Report is 2 commits behind head on main.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6842      +/-   ##
==========================================
- Coverage   86.92%   86.90%   -0.03%     
==========================================
  Files         263      263              
  Lines       12382    12382              
==========================================
- Hits        10763    10760       -3     
- Misses       1619     1622       +3     

Flag	Coverage Δ
unittests-Project-Experimental	86.75% <ø> (-0.08%)	⬇️
unittests-Project-Stable	86.80% <ø> (+<0.01%)	⬆️
unittests-Solution	86.47% <ø> (-0.43%)	⬇️
unittests-UnstableCoreLibraries-Experimental	86.07% <ø> (ø)

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see 3 files with indirect coverage changes