Changes to cycle analytics docs

See merge request gitlab-org/gitlab-ce!31572

Add missing (FREE ONLY) docs tier badge

See merge request gitlab-org/gitlab-ce!31755

Note that assigning many people is starter feature

See merge request gitlab-org/gitlab-ce!30700

Update Mattermost System Console settings page URL for webhooks

See merge request gitlab-org/gitlab-ce!31334

Add docs page for productivity_analytics

See merge request gitlab-org/gitlab-ce!31460

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

65483 add a resend confirmation link EE

See merge request gitlab-org/gitlab-ee!15162

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

Support multiple sites in DAST reports

See merge request gitlab-org/gitlab-ee!14787

- getDastSite behaviour has been changed to force convert reports site
  property into an Array if needed
- parseDastIssues now concatenates issues found in all sites
- legacy DAST reports are still supported
- tests have been updated accordinly

Move dependency scanning reports to mr widget backend

See merge request gitlab-org/gitlab-ee!15023

Expose new end point
Small change in front end

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