Fix feature flags for Gitaly's RemoteService RPCs

lib/gitlab/git/repository.rb

@@ -919,7 +919,7 @@ module Gitlab
 
       # If `mirror_refmap` is present the remote is set as mirror with that mapping
       def add_remote(remote_name, url, mirror_refmap: nil)
-        gitaly_migrate(:operation_user_add_tag) do |is_enabled|
+        gitaly_migrate(:remote_add_remote) do |is_enabled|
           if is_enabled
             gitaly_remote_client.add_remote(remote_name, url, mirror_refmap)
           else
@@ -929,7 +929,7 @@ module Gitlab
       end
 
       def remove_remote(remote_name)
-        gitaly_migrate(:operation_user_add_tag) do |is_enabled|
+        gitaly_migrate(:remote_remove_remote) do |is_enabled|
           if is_enabled
             gitaly_remote_client.remove_remote(remote_name)
           else