ci(ff): support feature freeze automation

[v1v]

This should help with creating the release branch automatically.

Tests

$ DRY_RUN=true make release-major-minor \
  CURRENT_RELEASE=9.5.0-test \
  PROJECT_OWNER=v1v          
Checking release requirements...
✓ Requirements check passed 
Creating release branch 9.5.0-test from main...
[DRY_RUN] git checkout main
[DRY_RUN] git pull origin main
[DRY_RUN] git checkout -b 9.5.0-test
[DRY_RUN] git push origin 9.5.0-test
⚠ DRY_RUN mode: Branch created locally but NOT pushed to remote 

Next steps:
1. Create branch protection rules at:
   https://github.com/v1v/elastic-stack-installers/settings/branch_protection_rules/new
2. Notify release team in #mission-control
✓ Major/minor release branch created successfully 

 make release-major-minor \
  CURRENT_RELEASE=9.5.0-test \
  PROJECT_OWNER=v1v
Checking release requirements...
✓ Requirements check passed 
Creating release branch 9.5.0-test from main...
Switched to branch 'main'
Your branch is ahead of 'origin/main' by 39 commits.
  (use "git push" to publish your local commits)
From https://github.com/v1v/elastic-stack-installers
 * branch            main       -> FETCH_HEAD
Already up to date.
Switched to a new branch '9.5.0-test'
Total 0 (delta 0), reused 0 (delta 0), pack-reused 0 (from 0)
remote: 
remote: Create a pull request for '9.5.0-test' on GitHub by visiting:
remote:      https://github.com/v1v/elastic-stack-installers/pull/new/9.5.0-test
remote: 
To https://github.com/v1v/elastic-stack-installers.git
 * [new branch]      9.5.0-test -> 9.5.0-test
✓ Created and pushed branch 9.5.0-test 

Next steps:
1. Create branch protection rules at:
   https://github.com/v1v/elastic-stack-installers/settings/branch_protection_rules/new
2. Notify release team in #mission-control
✓ Major/minor release branch created successfully 

https://github.com/v1v/elastic-stack-installers/tree/9.5.0-test

[elasticmachine]

💔 Build Failed

• Buildkite Build
• Commit: 8a0ca45

Failed CI Steps

• 👷 Build stack installers / Snapshot
• 👷 Build stack installers / Snapshot

History