Fix Vue warnings about string idKey in Related Issues

See merge request !2190

Add instructions for setting up a custom version of OpenSSH for Geo

See merge request !2191

Speed up counting approvers when some are specified

See merge request !2196

Change GitLab version for object storage

See merge request !2197

Document the manual steps needed to use repmgr

See merge request !2172

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When some approvers are specified, we still need to check the potential set of
approvers, including people with developer access and up. Doing that with an OR
took a long time (over 500ms) on GitLab.com, even when only one approver was
specified.

By doing a UNION instead, we get much faster results (less than 10ms). Also, as
we are using UNION and not UNION ALL, we don't need to exclude the approvers
specified from the query to get everyone with access.

Fix bad connector - verify if both new and resolved issues are present before adding the connector.

Closes #2676

See merge request !2187

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```
[Vue warn]: Invalid prop: type check failed for prop "idKey". Expected
Number, got String.
```

We now fail on Vue warnings,
https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/12163/

Re-enable autocomplete for milestones, tags, releases, and wiki --  EE merge edition

Closes gitlab-ce#33598

See merge request !2170

Resolve "Cross-project pipelines are broken"

Closes #2682

See merge request !2166

Fix avatar images in pipeline and approval emails

See merge request !2182

Fix https://gitlab.com/gitlab-org/gitlab-ce/issues/33598

Fix some failing specs on master

Closes #2694

See merge request !2180

Add docs for multi-project pipelines graphs

See merge request !2136

Add link to issue for MySQL/subgroups drop support

See merge request !2184

Fix quoted example in triggers docs

Closes #2686

See merge request !2171

Mention limitations of MySQL in docs

See merge request !2165

Add info about artifacts object storage in docs

Closes #2311

See merge request !2147

Change a few missing `login_as` to `gitlab_sign_in`

See merge request !2176

[EE] Prepare for bypassing GitLab sign in in feature specs

See merge request !2140

Enable autocomplete on project snippets -- EE merge edition

See merge request !2174

CE upstream: Thursday

Closes gitlab-ce#31782, gitlab-ce#33529, gitlab-ce#32861, gitlab-ce#33483, #2525, gitlab-ce#31263, gitlab-ce#33403, and gitlab-ce#33106

See merge request !2137

https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/1210 disabled
autocomplete for personal snippets and project snippets. But we want
autocomplete on project snippets.

Disable autocomplete on snippets comments -- EE merge edition

Closes gitlab-ce#33594

See merge request !2167