Fix `ci_cd_settings`, `project_feature` Import

Closes #36710

See merge request gitlab-org/gitlab!20174

Reimplement search list of sentry errors

See merge request gitlab-org/gitlab!19666

That allows to filter Sentry issues by the search term
https://docs.sentry.io/workflow/search/

Remove redundant and dead code related to MySQL

See merge request gitlab-org/gitlab!20319

API Integration - CA Tasks by type chart

See merge request gitlab-org/gitlab!18252

Remove validate_merge_sha feature flag

Closes #27824

See merge request gitlab-org/gitlab!20348

Remove done callbacks from vue components markdown

Closes #28404

See merge request gitlab-org/gitlab!16842

Replace hardcoded projects query param with constant

See merge request gitlab-org/gitlab!20336

Revert "Add --tiller-namespace to helm commands in scripts"

Closes #36722

See merge request gitlab-org/gitlab!20359

This reverts merge request !19858

Improve ordering of routes

See merge request gitlab-org/gitlab!20155

Since the app supports PostgreSQL only there is  no need in this variable.

Seems like the issue https://github.com/DatabaseCleaner/database_cleaner/issues/347
occurs only for MySQL. We removed support for MySQL in
https://gitlab.com/gitlab-org/gitlab-foss/merge_requests/29790.

In https://gitlab.com/gitlab-org/gitlab-foss/merge_requests/29790 we
removed support for MySQL.

Follow up https://gitlab.com/gitlab-org/gitlab/commit/4aa76dddecc048cef24963323afe59f1c120cb72

Remove `Pipeline#process!` method

See merge request gitlab-org/gitlab!20223

Removed release edit url for user not allowed to update

Closes #36257

See merge request gitlab-org/gitlab!20136

Create DB tables for storing mentioned users using postgres array type

Closes #21800

See merge request gitlab-org/gitlab!19009

Ignore state column for issues/merge_requests

See merge request gitlab-org/gitlab!19574

Third step of the plan of moving state:string column
to state_id:integer.
The state_column will be removed by a migration in the next release.
See the complete plan at https://gitlab.com/gitlab-org/gitlab/issues/33814

Nullify user roles with software developer value

Closes gitlab-org/growth/engineering#92

See merge request gitlab-org/gitlab!19569

Allow to use issue templates on service desk

See merge request gitlab-org/gitlab!19515

Let issue templates be applied on service desk issues

Place the New Users per Environment Behind a FF

See merge request gitlab-org/gitlab!20088

Documentation: explain which secrets are needed in Gitaly HA config

Closes gitaly#2148

See merge request gitlab-org/gitlab!19882

Update conan docs version info

See merge request gitlab-org/gitlab!20237

Document addition of eslint react plugin

See merge request gitlab-org/gitlab!20200

This removes the `validate_merge_sha` feature flag that was added in
https://gitlab.com/gitlab-org/gitlab/merge_requests/19579 which was
included in 12.5

Starting 12.5 we started writing the merge_sha inside the merge params
for validating.

To avoid merges failing during a deploy, the feature flag wasn't
defaulted to "on". But one release later we can remove it since the
SHAs will would have been written in the params regardless.

Make webmock allow requests to webpack too

See merge request gitlab-org/gitlab!19760

Fix projects list to show info in user's locale

Closes #31681

See merge request gitlab-org/gitlab!20015

Design view: Add link color to design comments

Closes #33052

See merge request gitlab-org/gitlab!20302

* Created DB tables for storing mentioned users, groups,
projects referenced in a note on issue, merge request, commit, epic
snippet or on issuable description. Mentioned users, groups, projects
will be stored as an array field in a corresponding table for: issues,
merge requests, commits, epics and snippets.

Update merge-when-pipeline-succeeds behavior on API

See merge request gitlab-org/gitlab!19641

Evidence docs and release api

See merge request gitlab-org/gitlab!19706