This reverts merge request !29832

We will introduce #cluster at a later stage.
Also deprecate this method

Will apply identation from
CSS to collapsible sections

This change ensures that all open <span> tags are closed before adding a
<br> tag.

This moves all existing `image/services/before_script/variables`
into `default:`. This allows us to easily add a default and
top-level entries. `default`: is keep backward compatible: to
be considered to be job if `default:script:` is specified. This
behavior should be removed.

All existing `image/services/before_script/variables` are properly
handled in root context.

Previously this behaviour was only available to group
and instance-level clusters, as some project clusters
relied on Kubernetes credentials being passed through
to the runner instead of having their resources managed
by GitLab (which is not available when using JIT). These
clusters have been migrated to unmanaged, so resources
can be created on demand for the remaining managed clusters.

We are deprecating this service in favor of instance wide clusters.
Therefore we removed some code that is not anymore needed for a
readonly cluster and also we added some flags to allow for this
deprecation. These flags are to be removed in the next release when
we finally completelly remove KubernetesService.

Whenever we are selecting a namespace to use for a
deployment or to query a cluster we want to exclude
Kubernetes namespace records that don't have a token
set as they will not have the required permissions.
However when configuring clusters, we want to
use the original namespace record even if it has no
token, as a namespace has to be unique on a cluster.

There seems to be several examples where service_account_token is blank
even in GitLab.com newly created kubernetes_namespaces . We have not
figured out why they are blank but this should hopefully fix some issues
similar to https://gitlab.com/gitlab-org/gitlab-ce/issues/55362

This reverts merge request !27503

updated several specs and factories to accomodate new permissions

Refactored regex pattern matching to eagerly return tokens

Packaged behind a default-enabled feature flag and added operator documentation.

Gitlab::HTTP now resolves the hostname only once, verifies the IP is not
blocked, and then uses the same IP to perform the actual request, while
passing the original hostname in the `Host` header and SSL SNI field.

Update documentation to reflect removal

Fixes https://gitlab.com/gitlab-org/gitlab-ce/issues/58241
* Upgrade Fugit gem to 1.2.1 which recognizes cron expressions
for invalid days
* Reverted previously implemented workaround
* Leave test case which previously exposed the bug

With this workaround we temporarily prevent an
exception from Fugit gem to be raised in
Gitlab::Ci::CronParser

When this option is enabled, GitLab will create namespaces and service
accounts as usual. When disabled, GitLab wont create any project
specific kubernetes resources

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/56557

- Adds an endpoint on PipelinesController
- Adds a service that iterates over every build in a stage and
plays it.
- Includes 'play_manual' details on EntitySerializer
- Builds a new Stage state: PlayManual. An stage can take this status if
it has manual builds or an skipped, scheduled or manual status
- Includes FE modifications and specs

This adds support for != and !~ operators
giving more flexibility in comparing values

Specs that test canceled jobs now
- expect them not to be retryable or playable
- expect them not to show retry buttons

Specs that test retryability now
- use failed status instead of canceled status

JIT resource creation blocks deployments if a user is
self-managing their cluster, as it will fail the build
if unable to create a namespace and service account.

Using a custom namespace and service account was previously
supported for project level clusters, so we should preserve
this functionality.

https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/27352

Require all templates to use default stages

Closes #59992

See merge request gitlab-org/gitlab-ce!26954

(cherry picked from commit 39eb16aa)

e0df05cf Require all templates to use default stages

In both e2e QA tests and unit tests, reduce the number of retires
to 2 (i.e., 1 initial and one retry)

This reverts merge request !26954