Merge branch...

Merge branch '442061-feature-flag-rollout-of-update_vuln_reads_traversal_ids_via_event' into 'master' 

Cleanup Vuln Reads denormalisation event FF's

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/145430



Merged-by: Brian Williams <bwilliams@gitlab.com>
Approved-by: Bala Kumar <sbalakumar@gitlab.com>
Approved-by: Brian Williams <bwilliams@gitlab.com>
Reviewed-by: Bala Kumar <sbalakumar@gitlab.com>
Co-authored-by: Mehmet Emin INAC <minac@gitlab.com>