- Original EE MR: https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/14827

- This will make it easy to identify the project even if admins change
the name of the project or move it.

https://gitlab.com/gitlab-org/gitlab-ce/issues/62971

Adds support to EnvironmentsController#metrics_dashboard
for the following params: group, title, y_label
These params are used to uniquely identify a panel on
the metrics dashboard.

Metrics are stored in several places, so this adds
utilities to find a specific panel from the database
or filesystem depending on the metric specified.

Also moves some shared utilities into separate classes,
notably default values and errors.

Don't attempt to contact registry if it is disabled

See merge request gitlab-org/gitlab-ce!31553

Kubernetes deployments on new clusters will now have
a separate namespace per project environment, instead
of sharing a single namespace for the project.

Behaviour of existing clusters is unchanged.

All new functionality is controlled by the
:kubernetes_namespace_per_environment feature flag,
which is safe to enable/disable at any time.

- Closes #60024

- Change PrometheusClient.new to accept a base url instead of an
  already created RestClient

- Use Gitlab::HTTP in PrometheusClient instead of creating RestClient
  in PrometheusService

- Move http_options from PrometheusService to
  PrometheusClient (follow_redirects: false)

- ensure that base urls don't have the trailing slash

- Created a `PrometheusClient#url` method that might not be strictly
  required

- Change rescued exceptions from RestClient::* to
  HTTParty::ResponseError where possible and StandardError for the
  rest

https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/21679 moved the
deletion of registry tags outside of a transaction, but introduced an
issue where Sidekiq would attempt to contact the container registry
during project destruction even if it were disabled.

Relates to:

* https://gitlab.com/charts/gitlab/issues/1455
* https://gitlab.com/gitlab-org/gitlab-ce/issues/45941

Add outbound setting for system hooks

See merge request gitlab-org/gitlab-ce!31177

Properly process all needs

Closes #65488

See merge request gitlab-org/gitlab-ce!31415

Currently, some of the jobs with `needs:`
would be processed in stages, it means
that `when:` for such jobs would not be
respected.

This changes the behavior to have a separate
execution paths for jobs with `needs:`.