This reverts merge request !30613

This makes `epic_issues` consistent with other tables
using our `RelativePositioning` class

Creating new records has been disabled, and all
existing records been migrated to clusters as of
https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/28534

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

Docker Registry Replication

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.

This is just in case the creation of this index takes
a while to create.

Per https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/31384, this
appears to drop the runtime of the query from 1.2 ms (cold), 500ms (warm
cache) to < 20 ms.

Also removes unnecessary methods causing extra queries

`allow_local_requests_for_hooks_and_services` was renamed to
`allow_local_requests_for_web_hooks_and_services`.

Simplify SystemHookUrlValidator to inherit from PublicUrlValidator
Refactor specs to move out shared examples to be used in both
system hooks and public url validators.

This MR adds new application setting to network section
`allow_local_requests_from_system_hooks`. Prior to this change
system hooks were allowed to do local network requests by default
and we are adding an ability for admins to control it.

CE port of https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/14520

Introducing Docker Registry replication

This implements the support for `needs:` keyword
as part of GitLab CI. That makes some of the jobs
to be run out of order.

- DB migration of board milestone values
- issue finder & spec updates

For customers with thousands of entries in the table, lookups for an
LDAP identity dominated the PostgreSQL statistics because of sequential
scans. We can speed this up by adding a partial index with the
extern_uid and provider.

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/59630

These migrations do the following:

- Adds a new `issue_id` column to `versions`. This fixes an n+1 problem
  when loading versions for an issue in GraphQL as AR can now load from
  cache
- Change the unique restraint on versions.sha to be scoped to `issue_id`
  as in order to import version data, we need to allow duplicate `sha`
  values for versions
- Update all versions with an `issue_id`

https://gitlab.com/gitlab-org/gitlab-ee/issues/11090

Adds Job specific variables to facilitate specifying variables when
running manual jobs.

This MR updates the y_label values and the label
values in common_metrics and cluster_metrics to
append the units of measurement to the labels.

It needs to default to an empty array logically.

`Array.reverse_each` is faster than `Array.reverse.each` because:

* reverse.each creates a new array then loops each element
* reverse_each loops in reverse order (no intermediate array created)

Also adds index to support scopes and queries

This supports https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/14656

* Limits raw requests to 300 per minute and per raw path.
* Add a new attribute to ApplicationSettings so user can change this
value on their instance.
* Uses Gitlab::ActionRateLimiter to limit the raw requests.
* Add a new method into ActionRateLimiter to log the event into auth.log

Related to https://gitlab.com/gitlab-org/gitlab-ce/issues/48717

Signed-off-by: NIstvan szalai <istvan.szalai@savoirfairelinux.com>

This is the first part of Docker Registry replication
    for secondary Geo node.

None of this code can be reached any more, so it can all be removed

This is no longer needed with Rails 5.2. opclass is the attribute used
per https://github.com/rails/rails/pull/19090/files.

Now that we've removed the monkey patch and restored the Rails schema
dumper, it appears Rails has dropped the inclusion of `using: :btree` as
well (https://github.com/rails/rails/pull/27981).

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/64529

Add cr remarks

Improve specs according to the review

Fix schema

Add cr remarks

Fix naming

Add cr remarks

To allow project filtering

Prepare summary for accepting multiple groups

Modify deploys group summary class

Add filtering by project name in issues summary

Fix rubocop offences

Add changelog entry

Change name to id in project filtering

Fix rebase problem

Add project extraction

We also scope the `rescue`s to only those raised by ActiveRecord, which
would have allowed us to spot this logic error sooner.

and state