Fix pipeline etag

Closes #32658

See merge request !11615

[ci skip]

Add feature test with unicode trace

See merge request !10736

Make static filter entries scroll with dynamic ones

See merge request !11640

Move docs 'superpowers' items to their respective sections

See merge request !11646

Fix group/project name ellipsis button doing nothing

Closes #32738

See merge request !11623

Hide clone panel and file list when user is only a guest (with review comments addressed)

Closes #30432, #3142, and #17489

See merge request !11631

Add missing regex to backup manager

Closes #32669

See merge request !11635

Introduce UsersCache for storing user entities in frontend

See merge request !11404

Update Helm Chart documentation

See merge request !11624

Run MySQL tests on *-stable as well

See merge request !11602

Fix propagate service spec transient failure

See merge request !11629

Handle Promise rejections in RecentSearchesService spec

See merge request !11206

Resolve "Follow-up from "Add "SHA mismatch" state to the MR widget""

Closes #32480

See merge request !11466

Make sure that Arel.sql would work for update_column_in_batches

See merge request !11610

Sort environments folders when opening them

Closes #30814

See merge request !11436

Squashed commit of the following:

commit 43e5bba774e9e383dd55c665e82f6fcfc4ebfc4f
Author: Shinya Maeda <gitlab.shinyamaeda@gmail.com>
Date:   Mon Apr 17 17:28:44 2017 +0900

    Add fix

commit 09610eebdf22ad048812bb86022504b2ad917e19
Author: Shinya Maeda <gitlab.shinyamaeda@gmail.com>
Date:   Mon Apr 17 17:03:49 2017 +0900

    Add trace test

Update gitlab.yml with default setting

See merge request !11614

https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/10901/diffs
introduced a new naming scheme for backups, but the code which
cleans up old backups wasn't updated accordingly. In order to
maintain backward compatibility, we need to account for 3 naming
schemes.

Fix migrations for older PostgreSQL versions

Closes #32721

See merge request !11620

Fix https://gitlab.com/gitlab-org/gitlab-ce/issues/32738

Prevent project transfer if a new group is not selected

Closes #25455

See merge request !11214

- Do not care about error when creating index on PostgreSQL
- Test against PostgreSQL 9.2

Handle transient MR query count spec

See merge request !11571

Change links to issuable meta to black

Closes #32418

See merge request !11505

These were untested by the cherry picked commit.