Make ruby 2.6 the officially supported version

See merge request gitlab-org/gitlab-ce!31675

Merge branch '64950-move-download-csv-button-functionality-in-metrics-dashboard-cards-into-the-dropdown' into 'master'

Move download CSV functionality to dropdown in metrics

Closes #64950

See merge request gitlab-org/gitlab-ce!31679

This MR adds the functionality to download metrics data
as CSV. It also removes the exportMetricsToCsvEnabled feature
flag which was used before the dropdown was implemented to
display a button.

Open source alternative to reCAPTCHA for GitLab.com registration

See merge request gitlab-org/gitlab-ce!31625

Add a resend confirmation link when grace period is expired

See merge request gitlab-org/gitlab-ce!31476

This link is shown when a user tries to login with an unconfirmed
email address and the grace period has expired

Changed selection classes to harmonize with other settings

Closes #62286

See merge request gitlab-org/gitlab-ce!31110

Migrate remaining users with null private_profile

See merge request gitlab-org/gitlab-ce!31708

Resolve "Follow-up from !30458: create `kubectl_delete(args)`"

See merge request gitlab-org/gitlab-ce!31353

- refactor Knative and Prometheus

Migrates Snowplow backend implementation from EE to CE

See merge request gitlab-org/gitlab-ce!31199

This introduces several changes, but these are all just ported from the
EE project.

Fixed border styles for callout

Closes #66000

See merge request gitlab-org/gitlab-ce!31782

Revert "Merge branch '64341-data-and-privacy-agreement-for-gitlab-users' into 'master'"

See merge request gitlab-org/gitlab-ce!31817

This reverts merge request !30808

Track views of cycle analytics show page

See merge request gitlab-org/gitlab-ce!31717

This change adds a new counter 'cycle_analytics_views' to the usage data
metrics to count the page views for cycle analytics show page.

Fix the style-lint errors and warnings for wiki.scss

Closes #59829

See merge request gitlab-org/gitlab-ce!31656

There were two errors: duplicate styles and @extend used with a class
name. I added `.top-area` class to all the instances where
`.wiki-page-header` is used since %top-area didn't really make a lot of
sense as a placeholder selector. This is also consistent with behaviour
on other pages where the `.top-area` class is used alongside the other
classes for the specific header styling.

Add `ci_dag_limit_needs`

See merge request gitlab-org/gitlab-ce!31803

Docs add guest user clarification

See merge request gitlab-org/gitlab-ce!31805

Reduce Gitaly calls in PostReceive

Closes #65878

See merge request gitlab-org/gitlab-ce!31741

Elasticsearch versioned schema for Snippet

See merge request gitlab-org/gitlab-ce!31465

This makes to limit `needs:` to 5 by default.
Allow to increase the limit to 50 with disable of FF.

Optimise dag processing

See merge request gitlab-org/gitlab-ce!31768

Reduce the CE/EE diff under `qa/`

See merge request gitlab-org/gitlab-ce!31799

Add notification for updated privacy policy

Closes #64341

See merge request gitlab-org/gitlab-ce!30808

This adds a notification to let users know of our updated privacy
policy.

Users can dismiss the notification either by following the link or
closing the notification via an "x" icon.

Add troubleshooting docs for Registry image push problems

See merge request gitlab-org/gitlab-ce!31807

CE backport for gitlab-org/gitlab-ee!14894: Fix the merge button dropdown

See merge request gitlab-org/gitlab-ce!31248