devops: switch to @tony.ganchev/eslint-plugin-header

[tonyganchev]

PR summary

Reasons:

• The fork is supported and updated.
• ESLint 9-native with full schema support and needing no hacks.
• Windows support
• Multiple other bugfixes.
• UX improvements - better error messages and more autofix capabilities.
• Extensive documentation.
• Better configuration format (although the old one is still supported).

Fixes: (not sure if non-maintainers should spam with devops issues).

PR Checklist

Please make sure that your PR fulfills the following requirements:

• [v] The commit message follows the
  Angular Commit Message Guidelines.
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

PR Type

• Bugfix
• Feature
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
• New tests
• [v] Build/CI related changes
• Documentation content changes
• Other (please describe)

What is the current behavior?

N/A

What is the new behavior?

N/A

Does this PR introduce a breaking change?

• Yes
• [v] No

Other information