Allowlist another cross-database query callsite

app/finders/ci/pipelines_for_merge_request_finder.rb

@@ -29,6 +29,7 @@ module Ci
 
     # Fetch all pipelines without permission check.
     def all
+      ::Gitlab::Database.allow_cross_joins_across_databases(url: 'https://gitlab.com/gitlab-org/gitlab/-/issues/336891') do
         strong_memoize(:all_pipelines) do
           next Ci::Pipeline.none unless source_project
 
@@ -42,6 +43,7 @@ module Ci
           sort(pipelines)
         end
       end
+    end
 
     private