Move Repository#HasLocalBranches to OPT_OUT

Part of gitlab-org/gitaly#616

changelogs/unreleased/zj-move-opt-out-ruby-endpoints.yml

+---
+title: Move Ruby endpoints to OPT_OUT
+merge_request:
+author:
+type: other

lib/gitlab/git/repository.rb

@@ -228,7 +228,7 @@ module Gitlab
       end
 
       def has_local_branches?
-        gitaly_migrate(:has_local_branches) do |is_enabled|
+        gitaly_migrate(:has_local_branches, status: Gitlab::GitalyClient::MigrationStatus::OPT_OUT) do |is_enabled|
           if is_enabled
             gitaly_repository_client.has_local_branches?
           else