Remove rubocop rule preventing indexes from being added to tables: ci_builds_metadata, events, taggings
In %14.3 we added rules preventing indexes from being added to ci_builds_metadata, events and taggings while we completed the PK migrations. This is a follow up issue to ensure that we remove those rules as they will no longer be needed after the migration has completed.
- Add to rubocop rule preventing index additions to tables currently on Step 2 - https://gitlab.com/craig-gomes
- Code - https://gitlab.com/gitlab-org/gitlab/-/blob/master/rubocop/cop/migration/prevent_index_creation.rb#L11