Update karma to 4.2.0

Closes #65660

See merge request gitlab-org/gitlab-ce!31495

Improve the performance of viewing deploy keys

Closes #43080

See merge request gitlab-org/gitlab-ce!31384

Make issue boards importable

See merge request gitlab-org/gitlab-ce!31434

Backport productivity analytics migrations

See merge request gitlab-org/gitlab-ce!31298

Resolve "Add point of interest discussions to designs"

See merge request gitlab-org/gitlab-ce!31276

This reverts commit d754beb74fbc06a2c744e15be4aa2831d8cef1c0.

Hides loading spinner after request

Closes #65263

See merge request gitlab-org/gitlab-ce!31478

Alerts dropdown to modal CE2

See merge request gitlab-org/gitlab-ce!31181

Added as EE backport

Resolve "DOCS Clarify usage of ElasticSearch with Gitaly non-NFS"

Closes #65606

See merge request gitlab-org/gitlab-ce!31454

Edit new troubleshooting doc

See merge request gitlab-org/gitlab-ce!31512

Cross link between cluster topics

Closes #65617

See merge request gitlab-org/gitlab-ce!31506

SSoT for customization docs

Closes #64588

See merge request gitlab-org/gitlab-ce!31308

Reviewed all docs in the customization section
and updated them to adhere to our SSoT standards.

In the pipeline's actions, moves the request
to the component to allow to manage the inner
state properly

Update reliable fetcher

See merge request gitlab-org/gitlab-ce!31416

Add note about refactoring to board_service.js

See merge request gitlab-org/gitlab-ce!31468

Also update karma-chrome-launcher, karma-coverage-istanbul-reporter,
and karma-webpack.
Signed-off-by: Takuya Noguchi <takninnovationresearch@gmail.com>

Docs: add addon minute roll over info

See merge request gitlab-org/gitlab-ce!31350

Merge branch '65386-docs-add-elasticsearch-troubleshooting-to-administrator-troubleshooting-section' into 'master'

Docs-Add ElasticSearch Troubleshooting

Closes #65386

See merge request gitlab-org/gitlab-ce!31343

* Added elasticsearch.md
* Added reference to guide in Troubleshooting section

Use Rails 5.2 Redis caching store

Closes #64794

See merge request gitlab-org/gitlab-ce!30966

Fix links to unassigned, low weight issues for first time contributors

See merge request gitlab-org/gitlab-ce!31485

(Really) Fix Ruby 2.5 compatibility for diverging counts of branches

Closes #64143

See merge request gitlab-org/gitlab-ce!31491

We added retry_count increment when job is recovered

Fix Admin area user access level radio button labels

See merge request gitlab-org/gitlab-ce!31154

In the admin user edit form, access level radio button labels didn't have
the correct 'for' value. Clicking on the label did not select the radio
button. This makes usability a bit nicer since the click area is increased
when the label is clickable.

This is the first step in providing a fault-tolerant and distributed
Redis caching store. We disable compression to avoid introducing a
change that could have an adverse effect in production.

Note that we won't be able to take advantage of the fault-tolerance and
distributed features yet until we solve
https://gitlab.com/gitlab-org/gitlab-ce/issues/64829.

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/64794

!31480 does not fully restore compatibility because another Ruby 2.6
feature besides `Enumerable#filter` was used in commit ca5cd7b7. The use
of `Enumerable#to_h`'s block is now replaced by an explicit
`Enumerable#map` call.

Error message:

	TypeError (wrong element type Gitlab::Git::Branch at 0 (expected array)):
  	app/controllers/projects/branches_controller.rb:53:in `to_h'

See https://bugs.ruby-lang.org/issues/15143.

Fixes #64143.

Resolve "Add padding to "merged by" widget"

Closes #64831

See merge request gitlab-org/gitlab-ce!30972

This reverts commit c3751046d217008404a0bd371e59d6ffd6734923.