Adapt branches and release automation for Parse Server 5 LTS (remove Parse Server 4 LTS)

[mtrezza]

New Feature / Enhancement Checklist

• I am not disclosing a vulnerability.
• I am not just asking a question.
• I have searched through existing issues.

Current Limitation

With release of Parse Server 6.

• Parse Server 4 LTS branched will be archived (no future commits)
• Parse Server 5 branch moves to LTS

Feature / Enhancement Description

• Create LTS branch release-5.x.x
• Update CI on branch release-5.x.x for LTS
  • 38f64be
  • 09d04b0
• Lock branch release-4.x.x via branch protection rule; no further commits allowed

In addition made changes so that future LTS branches won't require manual code changes and can follow the simplified process described in Publishing Major Release (Yearly Release):

• ci: Add auto-release LTS branch detection #8325
• ci: Add auto-release LTS branch detection #8326
• ci: Update release workflow for LTS branches #8327

Example Use Case

n/a

Alternatives / Workarounds

n/a

[parse-github-assistant]

Thanks for opening this issue!

• 🎉 We are excited about your ideas for improvement!

[mtrezza]

Closing, all tasks done (see above)