Create the jump to next unresolved feature flag

Issue: https://gitlab.com/gitlab-org/gitlab/-/issues/199718

app/controllers/projects/merge_requests_controller.rb

@@ -37,6 +37,7 @@ class Projects::MergeRequestsController < Projects::MergeRequests::ApplicationCo
     push_frontend_feature_flag(:file_identifier_hash)
     push_frontend_feature_flag(:batch_suggestions, @project, default_enabled: true)
     push_frontend_feature_flag(:auto_expand_collapsed_diffs, @project)
+    push_frontend_feature_flag(:hide_jump_to_next_unresolved_in_threads, @project)
   end
 
   before_action do