Revert workflow permissions after Copilot assignment testing

[mrunalhirve128]

Reverts contents:write permission - testing confirmed GITHUB_TOKEN cannot assign Copilot regardless of workflow permissions.

[github-actions]

⚠️ Deprecation Warning: The deny-licenses option is deprecated for possible removal in the next major release. For more information, see issue 997.

Dependency Review

✅ No vulnerabilities or license issues or OpenSSF Scorecard issues found.

Scanned Files

None

[Copilot]

Pull request overview

This PR reverts the workflow permissions for the auto-triage workflow back to minimal required permissions after testing confirmed that GITHUB_TOKEN cannot assign Copilot coding agents regardless of workflow permissions.

Changes:

• Reverted contents permission from write back to read in the auto-triage workflow
• Removed unnecessary pull-requests: write and actions: read permissions that were added for testing
• Updated workflow permission tests to enforce the minimal permission set (contents: read, issues: write)

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
.github/workflows/auto-triage-issues.yml	Reverted workflow permissions to minimal required set (contents: read, issues: write), removing experimental pull-requests and actions permissions
autoTriage/tests/workflows/test_workflows.py	Updated test to assert contents permission must be "read" (not "read" or "write"), removing temporary testing flexibility