Merge branch '431950-product_analytics_usage_quota-feature-flag-cleanup' into 'master'

Clean up product_analytics_usage_quota feature flag

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/137078



Merged-by: Ezekiel Kigbo <3397881-ekigbo@users.noreply.gitlab.com>
Approved-by: Robert Hunt <rhunt@gitlab.com>
Approved-by: Ezekiel Kigbo <3397881-ekigbo@users.noreply.gitlab.com>
Approved-by: Lorena Ciutacu <lciutacu@gitlab.com>
Reviewed-by: Lorena Ciutacu <lciutacu@gitlab.com>
Co-authored-by: Lorena Ciutacu <lciutacu@gitlab.com>
Co-authored-by: Elwyn Benson <ebenson@gitlab.com>