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

Often live traces are removed even though the archived trace
doesn't exist. This commit checkes the existence strictly.

Schedules a Namespace::AggregationSchedule worker if some of the project
statistics are refreshed.

The worker is only executed if the feature flag is enabled.

Sets lease_release? to false to prevent the job to be re-executed more
often than lease timeout

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/64079

- Add two new ActiveRecord models:
  - RootNamespaceStoragestatistics will persist root namespace statistics
  - NamespaceAggregationSchedule will save information when a new update
to the namespace statistics needs to be scheduled
- Inject into UpdateProjectStatistics concern a new callback that will
call an async job to insert a new row onto NamespaceAggregationSchedule
table
- When a new row is inserted a new job is scheduled. This job will
update call an specific service to update the statistics and after that
it will delete thee aggregated scheduled row
- The RefresherServices makes heavy use of arel to build composable
queries to update Namespace::RootStorageStatistics attributes.
- Add an extra worker to traverse pending rows on
NAmespace::AggregationSchedule table and schedule a worker for each one
of this rows.
- Add an extra worker to traverse pending rows on
NAmespace::AggregationSchedule table and schedule a worker for each one
of this rows

Instance-level cluster pod terminal access

Closes #55489, #55488, #55487, and #61156

See merge request gitlab-org/gitlab-ce!28613

Also add ::Gitlab::LetsEncrypt.enabled? shortcut
and simplify it a lot

This enables terminals for group and project level clusters.
Previously there was no way to determine which project (and
therefore kubernetes namespace) to connect to, moving this
logic onto Environment means the assoicated project can be
used to look up the correct namespace.

Add index for pages domain ssl auto renewal
Add PagesDomain.needs_ssl_renewal scope
Add cron worker for ssl renewal
Add worker for ssl renewal
Add pages ssl renewal worker queues settings

Remove deprecated call in BuildSuccessWorker

Closes #63622

See merge request gitlab-org/gitlab-ce!29958