Cleanup ignore_table rule for `untracked_files_for_uploads`
This looks like we could clean it up: https://gitlab.com/gitlab-org/gitlab/blob/7a75038a/config/initializers/active_record_schema_ignore_tables.rb#L2
ActiveRecord::SchemaDumper.ignore_tables = ["untracked_files_for_uploads"]
We might want to clean this up together with the background migration, if it's not needed anymore. This seems related to #218998 (closed), too.
Edited by Michael Kozono