This commit extracts `kubectl`, `helm` and `codeclimate` versions as CI
variables.

`kubectl` changes from latest stable version to `1.8.6`, the other two are just
extracted in order to be easily updated; now we can also test tool upgrades
overriding CI secret variables.

Use heredoc for long strings so it's easier to read

See merge request gitlab-org/gitlab-ce!16179

Fix API endpoints to edit wiki pages where project belongs to a group

Closes #40453

See merge request gitlab-org/gitlab-ce!16170

Merge branch '37843-ci-trace-ansi-colours-256-bold-have-no-css-due-wrongly-ansi2html-light-color-variant-conversion-feature' into 'master'

fix issue #37843

Closes #37843

See merge request gitlab-org/gitlab-ce!15902

Update Auto DevOps template

See merge request gitlab-org/gitlab-ce!16042

Updates documentation for Prometheus and Kubernetes integration

Closes #41432

See merge request gitlab-org/gitlab-ce!16156

Handle GitLab hashed storage repositories using the repo import task

Closes #39870

See merge request gitlab-org/gitlab-ce!16027

Resolve "reStructuredText rendering of definition lists"

Closes #13355

See merge request gitlab-org/gitlab-ce!16202

Pre commit prettier

See merge request gitlab-org/gitlab-ce!16061

Move 2FA disable button #35836

Closes #35836

See merge request gitlab-org/gitlab-ce!16177

Re-add width for sidebar context header

See merge request gitlab-org/gitlab-ce!16180

- Removed disable button from /profile/account
- Added disable button to /profile/two_factor_auth
- Changed 2FA breadcrumb from 'User Settings > Account > Account' to 'User Settings > Account > Two-Factor Authentication'

We'd need to keep track of project full path otherwise directory tree created with hashed storage enabled cannot be usefully imported using the import rake task.

Speed up generation of commit stats by using Rugged native methods

See merge request gitlab-org/gitlab-ce!16186

Migrate repo forking to Gitaly

Closes gitaly#825

See merge request gitlab-org/gitlab-ce!16018

Fix `rake db:seed_fu` not doing anything in CI

Closes #41517

See merge request gitlab-org/gitlab-ce!16146

Switch some bundles to use Axios

Closes #41043

See merge request gitlab-org/gitlab-ce!15951

Add i18n helpers to branch comparison view

See merge request gitlab-org/gitlab-ce!16031

Resolve "gitlab-rake gitlab:import:repos schedules an import"

Closes #41424

See merge request gitlab-org/gitlab-ce!16115