Port gitlab-ee!5532 to CE

See merge request gitlab-org/gitlab-ce!20100

Add a helper to rename a column using a background migration

Closes #47591

See merge request gitlab-org/gitlab-ce!20180

Add index on deployable_type/id for deployments

Closes #48380

See merge request gitlab-org/gitlab-ce!20178

Move repo backup RPC's to opt-out

See merge request gitlab-org/gitlab-ce!20151

Resolve "Wiki page returns error code 502"

Closes #48269

See merge request gitlab-org/gitlab-ce!20174

Update _scopes_form.html.haml to remove duplicate information

See merge request gitlab-org/gitlab-ce!19727

Use the branch instead of the tag to install

Closes #48341

See merge request gitlab-org/gitlab-ce!20169

Resolve "Removed omniauth provider causing invalid application setting"

Closes #46783

See merge request gitlab-org/gitlab-ce!20129

i18n: externalize strings from 'app/views/projects/deployments'

See merge request gitlab-org/gitlab-ce!19848

Update pipeline icon in web ide sidebar

Closes #48206

See merge request gitlab-org/gitlab-ce!20058

This works the same way as change_column_type_using_background_migration, but
for renaming a column. It takes a table, not a relation, to match its concurrent
counterpart.

Also, generalise the cleanup migrations to reduce code duplication.

i18n: externalize strings from 'app/views/admin/labels'

See merge request gitlab-org/gitlab-ce!19926

Rails5 fix arel from in mysql_median_datetime_sql

See merge request gitlab-org/gitlab-ce!20167

Fix refresh cache for open issues count service

Closes #47945

See merge request gitlab-org/gitlab-ce!19904

`Nokogiri::XML::Node#ancestors` appears to be much slower than
`HTML::Pipeline::Filter#has_ancestor?` for these purposes. We already use
`#has_ancestor?` elsewhere, so this change also makes this filter more
consistent with other banzai filters.

CE:  Move some EE only codes in models to their EE modules

See merge request gitlab-org/gitlab-ce!20160

Update wrong initial setting transfer in application_settings_controller.rb

See merge request gitlab-org/gitlab-ce!20059

Css fix for search dropdown overflow issue.

See merge request gitlab-org/gitlab-ce!20011

i18n: externalize strings from 'app/views/shared/boards'

See merge request gitlab-org/gitlab-ce!19934

Add Hiroyuki Sato as a Japanese proofreader

See merge request gitlab-org/gitlab-ce!20134

Set flash error message only for current request when updating project

Closes #43772

See merge request gitlab-org/gitlab-ce!20126

Signed-off-by: Rémy Coutable <remy@rymai.me>

Update CONTRIBUTING.md to fix links

See merge request gitlab-org/gitlab-ce!19814

Add back copy for existing gcp accounts within offer banner

See merge request gitlab-org/gitlab-ce!20159

Merge branch '48339-sorting-by-name-on-explore-projects-page-renders-a-500-error-when-logged-in' into 'master'

Resolve "Sorting by name on explore projects page renders a 500 error when logged in"

Closes #48339

See merge request gitlab-org/gitlab-ce!20162

Improve shelling out in bin/changelog

See merge request gitlab-org/gitlab-ce!18977

Fix alert button styling so that they don't show up white

Closes #48407

See merge request gitlab-org/gitlab-ce!20163

Exclude Geo DB Yaml on CE too

See merge request gitlab-org/gitlab-ce!20143

Resolve "100% CPU for webpack-dev-server running in GDK"

Closes #33886

See merge request gitlab-org/gitlab-ce!20113