Merge branch '389516-migrate-merge_request_metrics-id-to-bigint' into 'master'

Resolve "Migrate merge_request_metrics.id to bigint - flaky test"

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/124424



Merged-by: Adam Hegyi <ahegyi@gitlab.com>
Approved-by: Adam Hegyi <ahegyi@gitlab.com>
Approved-by: Alina Mihaila <amihaila@gitlab.com>
Co-authored-by: dfrazao-gitlab <dfrazao@gitlab.com>