Add usage ping generation to a rake task and to docs

See merge request gitlab-org/gitlab!48674

  - Add rake task to generate and print usage ping
  JSON
  - Add rake task to generate and send usage ping
  to Versions Application
  - Add docs

Fix future tense issues

See merge request gitlab-org/gitlab!49026

Remove Rails background transaction metrics

See merge request gitlab-org/gitlab!48024

Fix future tense issues

See merge request gitlab-org/gitlab!49027

Fix future tense issues

See merge request gitlab-org/gitlab!49023

Revert "Enable Query Cache for Load balancing"

See merge request gitlab-org/gitlab!49110

Fixing small typo

See merge request gitlab-org/gitlab!48948

Fix link to documentation

See merge request gitlab-org/gitlab!48958

Update shfmt docker image to latest stable v3.2.0.

See merge request gitlab-org/gitlab!48007

Added section for setting ES attributes from rails console to docs

See merge request gitlab-org/gitlab!48554

A quick fix for https://gitlab.com/gitlab-org/gitlab/-/issues/290733

Revert "Merge branch '276188-enable-query-cache-for-load-balancer' into
'master'"

This reverts commit 54f0e919, reversing
changes made to 0098407c.

New Crowdin updates: 2020-12-03

See merge request gitlab-org/gitlab!49096

Merge branch '290597-segmented-control-in-file-header-for-markdown-files-does-not-have-margin-to-edit-button' into 'master'

Fix segmented control in file header for markdown files

See merge request gitlab-org/gitlab!49059

Remove deprecated fa- styles

See merge request gitlab-org/gitlab!49099

Disable serverless pages domain proxy to kubernetes

See merge request gitlab-org/gitlab!48998

Better background contrast in dark mode

See merge request gitlab-org/gitlab!47359

MR widget items need some contrast against the background
inputs needed to be same color as the search bar background

Quarantine prevent_forking_outside_group_spec on production only

See merge request gitlab-org/gitlab!49093

Replaced last fadeTo in Commit history

See merge request gitlab-org/gitlab!49020

This is a squashed commit of all translations added by crowdin on
2020-12-03

Refactor docs testing docs

See merge request gitlab-org/gitlab!48863

Updated text to be more concise.

Fixed summary data for closed iterations

See merge request gitlab-org/gitlab!47879

Update summary to use the new values from the report, which
are fixed when the iteration is closed rather than continuing to update

Docs .gitignore API improvements

See merge request gitlab-org/gitlab!49065

Adjust default page size in query when listing pipelines

See merge request gitlab-org/gitlab!48673

Delete unused fixtures

See merge request gitlab-org/gitlab!48913

Use new gl-button in subscriptions checkout step page

See merge request gitlab-org/gitlab!48765

Add filter bar to group members view

See merge request gitlab-org/gitlab!48272