Backports of "Remove feature flag behind MR's multiple assignees"
Backports of "Remove feature flag behind MR's multiple assignees"

mmkassem/gitlabhq,mmkassem/gitlabhq,mmkassem/gitlabhq,stoplightio/gitlabhq,stoplightio/gitlabhq,mmkassem/gitlabhq,stoplightio/gitlabhq,stoplightio/gitlabhq