chore: add coverage tracking for namespace-generator

[github-actions]

Add Coverage Dashboard Tracking

This PR adds your repository to the Konflux Coverage Dashboard at:
https://konflux-ci.dev/coverage-dashboard/

What is the Coverage Dashboard?

The coverage dashboard automatically collects and displays test coverage metrics for all Konflux Go repositories in one centralized location. It provides:

• Unified view of coverage across all repositories and teams
• Package-level coverage breakdown for each repository
• Detailed HTML coverage reports for deep-dive analysis

What This PR Does

• ✅ Adds configuration for konflux-ci/namespace-generator to the coverage dashboard
• ✅ Sets up ownership mapping so your team can manage future changes
• ✅ Enables automatic coverage report generation from your test suite

After Merge

Your repository will automatically:

1. Appear on the dashboard within 24 hours (next scheduled run)
2. Have coverage metrics updated with each dashboard run
3. Generate detailed HTML coverage reports accessible from the dashboard

Review Checklist

• Verify exclude patterns are appropriate for your repository structure
• Confirm ownership assignment includes the right team members
• Repository has Go tests that will generate coverage data

[snyk-io]

✅ Snyk checks have passed. No issues have been found so far.

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