Remove Geo system hooks

See merge request !2644

Add LDAP sync endpoint to Groups API

Closes #2304

See merge request !2785

EE port of enable-new-navigaton-by-default

See merge request !2795

Docs: port article to EE

See merge request !2799

Change wording about the ssh key of Geo nodes admin page

Closes #3290

See merge request !2794

Merge branch '31273-creating-an-project-within-an-internal-sub-group-gives-the-option-to-set-it-a-public-ee' into 'master'

Port of "Resolve various visibility level settings issues" to EE

See merge request !2793

Add missing import statements

Closes #3268

See merge request !2791

Closes gitlab-org/gitlab-ee#3290.

Make namespace dropdown on new project page consistent

See merge request !2789

EE:  Remove unwanted refs after importing a project

See merge request !2792

Promote EE features

Closes #2887, #2888, #2918, #2966, #2987, #2988, and #2967

See merge request !2540

Move EE specific files (_ee) to the EE directory

See merge request !2673

Port of remove-sidebar-title to EE

See merge request !2672

* 36807-gc-unwanted-refs-after-import:
  Use `git update-ref --stdin -z` to delete refs
  Just use a block
  Fix tests
  Try to make reserved ref names more obvious
  Resolve feedback on the MR:
  Move to Projects::HousecleaningService
  Use block rather than just b
  Just use @project directly
  Just use methods over constants, so that we could
  Add changelog and tests
  Remove unwanted refs after importing a project

Instead of iterating through all the repository storages to find the
one that has the repository, take the information provided by the
deleted event.

Instead of dropping the column in a migration, ignore the column and
drop it in a post-deploy migration.

A follow-up MR for 10.1 will be made to remove the `ignore_column`
from GeoNode.

See:
https://docs.gitlab.com/ee/development/what_requires_downtime.html#dropping-columns

Instead of scheduling the workers from the code, use service with
`async_execute` instead.

To sync repos between primary and secondary different mechanisms were
you through-out the versions.

After removing the `refresh_projects` Geo API endpoint, also remove
the `refresh_wikis` endpoint, because refreshing wikis is also done by
the Geo Log Cursor.

And all related services and workers.

Adds CE to EE compatibility with 2756

See merge request !2788

EE API delete respect headers

See merge request !2782