Fix and simplify end-to-end tests for secret variables

Closes gitlab-qa#190

See merge request gitlab-org/gitlab-ce!17173

Resolve "Double closing system  notes when closing issue with Merge Request"

Closes #32546 and #32564

See merge request gitlab-org/gitlab-ce!17035

Don't attempt to update user tracked fields if database is in read-only

Closes gitlab-ee#4972

See merge request gitlab-org/gitlab-ce!17200

The tracking issue if this causes problems is
https://gitlab.com/gitlab-org/gitaly/issues/1028

Docs: Update all articles with the new layout (metadata from the frontmatter)

Closes #42831

See merge request gitlab-org/gitlab-ce!17187

Fix squash rebase not working when diff contained encoded data

Closes gitlab-ee#4960

See merge request gitlab-org/gitlab-ce!17205

[ci skip]

Backport webpack.config.js changes from EE

See merge request gitlab-org/gitlab-ce!17185

Fix Error 500 when viewing a commit with a GPG signature in Geo

Closes gitlab-ee#4825

See merge request gitlab-org/gitlab-ce!17207

Remember assignee when moving an issue

See merge request gitlab-org/gitlab-ce!17116

Sanitize extra blank spaces used when uploading a SSH key

Closes #40552

See merge request gitlab-org/gitlab-ce!17138

Closes gitlab-org/gitlab-ee#4825

When the applied diff contains UTF-8 or some other encoded data, the diff
returned back from the git process may be in ASCII-8BIT format. Writing this
data to stdin may fail if the data because stdin expects this data to be in
UTF-8. By switching the output to binmode, we ensure that the diff will
always be written as-is.

Closes gitlab-org/gitlab-ee#4960

Related to #41949

With Geo, attempting to view an endpoint with a user could result in an
Error 500 since Devise attempts to update the last sign-in IP and other
details.

Closes gitlab-org/gitlab-ee#4972

Update issue closing pattern to be more forgiving

Closes #17500

See merge request gitlab-org/gitlab-ce!17198

Revert "Merge branch 'expired-ci-artifacts' into 'master'"

See merge request gitlab-org/gitlab-ce!17193

Don't cache a nil repository root ref to prevent caching issues

See merge request gitlab-org/gitlab-ce!17179

Fix order dependencies in some specs

Closes #43296

See merge request gitlab-org/gitlab-ce!17189

This reverts merge request !16578

Our automatically-generated project paths are of the form project<N>. If a spec
manually specifies a project path of that form, it may conflict with the
automatically-generated paths in some circumstances.

Remove more route-based chunks from dispatcher.js

See merge request gitlab-org/gitlab-ce!16901

Resolve "Monaco service workers do not work with CDN enabled"

Closes #42641

See merge request gitlab-org/gitlab-ce!17021

Show loading button inline in MR widget

See merge request gitlab-org/gitlab-ce!17174

		    #	modified:   lib/gitlab/git/commit.rb

When a merge request is merged, it creates a commit with the
description of the MR, which may contain references and issue
closing references. As this will be handled in the PostMergeService
anyways, let's ignore merge commit generated from a MR.