Merge branch '521392-new-generate-commit-message-prompt' into 'master'

Add generate_commit_message_claude_3_7 feature flag

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/183311



Merged-by: Patrick Bajao <ebajao@gitlab.com>
Approved-by: Shinya Maeda <shinya@gitlab.com>
Approved-by: Patrick Bajao <ebajao@gitlab.com>
Co-authored-by: David Kim <dkim@gitlab.com>