Completed performance issues for the RP

This triage issue is designed to make it easier to enter performance improvements into the monthly release post.

Please review the issues below, taking the following steps:

  1. Determine if the issue has been completed.
  2. Add it to the corresponding Release Post MR if it has (markdown is provided for copy & paste).
  3. Check off the task item to show it's been reviewed.

project_management Backend issues

Please review these issues @donaldcook:

- [Issue creation is slow because it tries to update project counter cache](https://gitlab.com/gitlab-org/gitlab/-/issues/363603)
- [[graphql] Run in staging-canary environment](https://gitlab.com/gitlab-org/gitlab/-/issues/355930)
- [[graphql] Review all changes for correctness, possible inclusion in `master`](https://gitlab.com/gitlab-org/gitlab/-/issues/355929)
- [Improve performance of Issues List with Search API under load into next tier](https://gitlab.com/gitlab-org/gitlab/-/issues/326120)
- [[graphql] Main issue/MR for converting to the new query interpreter runtime...](https://gitlab.com/gitlab-org/gitlab/-/issues/210556)

product_planning Backend issues

Please review these issues @johnhope:

- [Optimise Notes::CopyService SQL queries](https://gitlab.com/gitlab-org/gitlab/-/issues/257809)

Be sure to check the issue list closer to the end of the milestone for any changes. You may also want to look through Merge Requests for any fixes that don't have an issue.

Edited by Donald Cook