Fix query performance in PipelinesFinder

Add additional `ci_pipelines.project_id = ?` clause that change
the execution to use `index_ci_pipelines_on_project_id_and_id_desc`
instead of `ci_pipelines_pkey` which speeds up the query a lot.

Related to https://gitlab.com/gitlab-org/gitlab/issues/37745.

app/finders/pipelines_finder.rb

@@ -39,7 +39,7 @@ class PipelinesFinder
 
   # rubocop: disable CodeReuse/ActiveRecord
   def from_ids(ids)
-    pipelines.unscoped.where(id: ids)
+    pipelines.unscoped.where(project_id: project.id, id: ids)
   end
   # rubocop: enable CodeReuse/ActiveRecord
 

changelogs/unreleased/37745-optimize-pipelines-finder.yml

+---
+title: Fix query performance in PipelinesFinder
+merge_request: 21092
+author:
+type: performance