Instead of creating a Kubernetes namespace on every
cluster related to a project, only create one on the
cluster the project is about to be deployed to.

The flag is on by default, but allows us to revert back
to the old behaviour if we encounter any problems.

Only create an associated project or group if there
were none already specified.

Builds that have deployments require Kubernetes resources
to be created before the build can be deployed. These
resources are no longer created when the cluster is
created, which allows us to only create the resources
required by each specific build.

Introduces the concept of Prerequisites for a CI build.
If a build has unmet prerequisites it will go through the
:preparing state before being made available to a runner.

There are no actual prerequisites yet, so current
behaviour is unchanged.

Introduces a new status for builds between :created and :pending
that will be used when builds require one or more prerequisite
actions to be completed before being picked up by a runner
(such as creating Kubernetes resources before deploying).

The existing :created > :pending transition is unchanged, so
only builds that require preparation will use the :preparing
status.

Add logging info to Go guide

Closes #57298

See merge request gitlab-org/gitlab-ce!25714

closes https://gitlab.com/gitlab-org/gitlab-ce/issues/57298

On GitLab University readme, add link to Education solutions page

See merge request gitlab-org/gitlab-ce!26230

Document better the package-and-qa job

See merge request gitlab-org/gitlab-ce!25978

Documentation : Update index.md

See merge request gitlab-org/gitlab-ce!26149

Docs: Fix note syntax

See merge request gitlab-org/gitlab-ce!26163

[documentation] add section on resolving errors and solution for push failure to GitHub

See merge request gitlab-org/gitlab-ce!26206

Externalize strings from `/app/views/projects/pipelines`

See merge request gitlab-org/gitlab-ce!26035

Docs: CI/CD intro - new graph

Closes #58720

See merge request gitlab-org/gitlab-ce!25934

Update clair-local-scan to 2.0.6

Closes #58482

See merge request gitlab-org/gitlab-ce!25743

Remove timeout for GitalyClient remove_remote

Closes #56015

See merge request gitlab-org/gitlab-ce!26213

Fix UI layout on Commits on mobile

Closes #58933

See merge request gitlab-org/gitlab-ce!26133

Fix error creating a merge request when diff includes a null byte

Closes #57710

See merge request gitlab-org/gitlab-ce!26190

Refactor groups and projects boards actions

See merge request gitlab-org/gitlab-ce!25568

Merge branch 'ce-6098-extract-ee-specific-files-lines-for-app-views-admin-application_settings' into 'master'

(CE Port) Extract EE specific files/lines for app/views/admin/application_settings

See merge request gitlab-org/gitlab-ce!25955

Reduce queries in spec/requests/api/merge_requests_spec.rb

See merge request gitlab-org/gitlab-ce!26110

Update browser requirements to be clear about minor versions.

See merge request gitlab-org/gitlab-ce!25805

Docs: Add link to namespace api doc to clarify URL-encoded path

Closes #57292

See merge request gitlab-org/gitlab-ce!26083

Edit note about remote includes

Closes #58836

See merge request gitlab-org/gitlab-ce!25999

Hide "Edited" when note is transformed or resolved

Closes #57330

See merge request gitlab-org/gitlab-ce!26143

[CE] Reduce differences with EE in a migration spec

See merge request gitlab-org/gitlab-ce!26162

Resolve "Merge request page loses state"

See merge request gitlab-org/gitlab-ce!25988

This can be slow because it must potentially remove a lot of remote
refs (if the remote being removed has a lot of refs)

Removes EE differences for environment_item_spec

Closes gitlab-ee#10424

See merge request gitlab-org/gitlab-ce!26185

Removes EE differences for environments_folder_bundle

Closes gitlab-ee#10027

See merge request gitlab-org/gitlab-ce!26184

Quarantine failing auto devops spec

See merge request gitlab-org/gitlab-ce!26207

Hashed Storage: Document Rollback mechanism

Closes #58738

See merge request gitlab-org/gitlab-ce!25960