In https://gitlab.com/gitlab-org/gitlab/-/merge_requests/68042 we found
that releasing primary connections can result in test suite errors. This
can happen when tests reuse a connection also used by Puma, but release
it instead of letting the Puma thread release it. Reproducing this is
difficult, but it happens often enough to be a problem.

Since Rails already releases model connections for us, we don't actually
need to release primary connections in the first place. See the
following for more information:

- https://tenderlovemaking.com/2011/10/20/connection-management-in-activerecord.html
- https://gitlab.com/gitlab-org/gitlab/-/merge_requests/68042#note_672850193

This commit changes the load balancer code to not release primary
connections, with the exception of one case where this _is_ needed.

Changelog: fixed

Add epic board scope to newly created epic

See merge request gitlab-org/gitlab!70028

Clean-up the Vuex store from labels widget

See merge request gitlab-org/gitlab!69944

Doc | Explains how to disable user auto-creation through Kerberos

See merge request gitlab-org/gitlab!69970

Fix GitHub Importer outdated diff notes not showing

See merge request gitlab-org/gitlab!69977

Edit new PAT content

See merge request gitlab-org/gitlab!69717

Update package title to react to resize

See merge request gitlab-org/gitlab!69846

Require confirmed email to enable 2FA

See merge request gitlab-org/gitlab!69926

Swaps out v-html with GlSprintf in MR widget

See merge request gitlab-org/gitlab!69845

Global Search - Header Search Default Items

See merge request gitlab-org/gitlab!69307

Quarantine test failing due to bug

See merge request gitlab-org/gitlab!69919

Merge branch 'philipcunningham-address-follow-up-feedback-from-dast-error-merge-request-335037' into 'master'

Clean up DAST profile not found error handling

See merge request gitlab-org/gitlab!69816

Changelog: fixed
EE: true

Remove the feature flag for explicit locking iids

See merge request gitlab-org/gitlab!69769

CTRT edits to YAML includes doc

See merge request gitlab-org/gitlab!68824

Preload repository cache using MGET

See merge request gitlab-org/gitlab!69627

docs: document to use CI_COMMIT_REF_SLUG instead of CI_COMMIT_REF_NAME for review apps

See merge request gitlab-org/gitlab!70008

Remove local vuex store from new labels widget

Add another 404 check to SAML SSO doc

See merge request gitlab-org/gitlab!69578

- Favours push instead of append
- Removes nil check and defers to ability check
- Removes questionable spec

Finalize conversion to bigint for ci_builds_metadata

See merge request gitlab-org/gitlab!65692

CVE ID Request button Feature Flag removal

See merge request gitlab-org/gitlab!67665

Add status columns to dependency proxy tables

See merge request gitlab-org/gitlab!69901

Update dependency core-js to ^3.17.3

See merge request gitlab-org/gitlab!69963

Refactor RegistryBatcher to make it reusable

See merge request gitlab-org/gitlab!69492

Update the backfill completion check from `build_id` to `id` to match
the migration record.

Add method to pseudonymize page url and referer url

See merge request gitlab-org/gitlab!69448

Changelog: other