Merge branch '467186-feature-flag-enable-integration_api_inheritance' into 'master'

[Feature flag] Rollout of `integration_api_inheritance`

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/159773



Merged-by: Mark Chao <mchao@gitlab.com>
Approved-by: Alex Buijs <abuijs@gitlab.com>
Approved-by: Mark Chao <mchao@gitlab.com>
Co-authored-by: bmarjanovic <bmarjanovic@gitlab.com>