Cleaned up code_suggestions_ga_owner_alert feature flag
What does this MR do and why?
Resolves https://gitlab.com/gitlab-org/gitlab/-/issues/440455
Cleaned up code_suggestions_ga_owner_alert feature flag
MR acceptance checklist
Please evaluate this MR against the MR acceptance checklist. It helps you analyze changes to reduce risks in quality, performance, reliability, security, and maintainability.
Screenshots or screen recordings
No visible change
How to set up and validate locally
Numbered steps to set up and validate the change are strongly suggested.
Related to #440455