Add docs for protected branches deletion feature

Closes gitlab-ce#32218

See merge request !2086

Refactor CI triggers docs

Closes #2616

See merge request !2079

Refactor Runners docs

See merge request !2061

Revert "Merge branch '2001-related-issues' into 'master'"

See merge request !2082

Sync email address from specified omniauth provider [EE]

See merge request !2072

Port project translations from CE to EE

See merge request !2066

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/32218

Fix audit logs spec failing on master

See merge request !2069

This reverts commit b34bc6fe, reversing
changes made to e9fcae37.

Object store for artifacts

Closes gitlab-ce#29203

See merge request !1762

Respect the external user setting in elasticsearch

See merge request !512

Port of mk-fix-git-over-http-rejections to EE

See merge request !2062

Add push events to Geo event log

Closes #2384

See merge request !1976

Improve “How to go back to using the `authorized_keys` file” section in docs

See merge request !2076

Improve form spec (EE)

See merge request !2067

Find a user by email from LDAP

Closes gitlab-ce#22924 and #2522

See merge request !2003

Add option to disable writing to `authorized_keys` file

Closes #1631

See merge request !2004

Fix a failing spec in spec/features/projects/ee/geo_clone_instructions_spec.rb

Closes #2605

See merge request !2070

Check if database_geo.yml exist before setting the tracking DB config

Closes #2603

See merge request !2071

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