Use the `squasher` gem to squash migrations older than 2018

Memoizing root_ancestor in Namespace

See merge request gitlab-org/gitlab-ce!30248

The root_ancestor method is heavily used in EE for the group_saml
feature. Having this memoization implemented in CE would eliminate
the need of overriding the root_ancestor method in EE.

Tidy spec for API::ProjectClusters

See merge request gitlab-org/gitlab-ce!30154

Fix 'learn more'-link on dependency page

Closes #12545

See merge request gitlab-org/gitlab-ee!14496

QA: transfer project spec

See merge request gitlab-org/gitlab-ce!28255

Hid re-named entries in subfolders

Closes #63984

See merge request gitlab-org/gitlab-ce!30242

Add ClusterRole step to external Knative docs

See merge request gitlab-org/gitlab-ce!30123

This reverts commit 092542d2fa5c036e4fc01ba3185f1dc0e9ddbebb.

Included a stray file

EE Port: Vue-i18n: app/assets/javascripts/clusters/ directory

See merge request gitlab-org/gitlab-ee!14330

i18n linting for .vue files under the
app/assets/javascripts/clusters/ directory

Vue-i18n: autofix for app/assets/javascripts/clusters directory

See merge request gitlab-org/gitlab-ce!29962

i18n linting for .vue files under the
app/assets/javascripts/clusters/ directory

This commit removes an anchor from the link that is used by the
'Learn more about the dependency list'-button.

The anchor was added directly to the path, which caused the rendered
output to be escaped and this resulted in an incorrect href.

Updates Gitlab.pot

Closes #12542

See merge request gitlab-org/gitlab-ee!14493

Expand docs on configuring jobs with private registry access

Closes gitlab-runner#3963

See merge request gitlab-org/gitlab-ce!27231

Fixes: https://gitlab.com/gitlab-org/gitlab-runner/issues/3963

Add new onboarding to flipper A/B testing

See merge request gitlab-org/gitlab-ce!30125

Add new onboarding to flipper A/B testing

Closes growth#82

See merge request gitlab-org/gitlab-ee!14424

Update dependency @gitlab/svgs to ^1.66.0

See merge request gitlab-org/gitlab-ce!30193

Vue-i18n: autofix for app/assets/javascripts/environments directory

See merge request gitlab-org/gitlab-ce!29966

i18n linting for .vue files under the
app/assets/javascripts/environments directory

EE Port - Vue-i18n: app/assets/javascripts/environments directory

See merge request gitlab-org/gitlab-ee!14332

i18n linting for .vue files under the
app/assets/javascripts/environments directory

Add Migration for Strategies Column on operations_feature_flag_scopes

See merge request gitlab-org/gitlab-ce!29808