Add missing cascading deletes on foreign keys for group_id

Closes #3343, #3344, and gitlab-ce#37311

See merge request !2878

Fix links and typo

See merge request !2883

Fix branch name regex not saving in /admin/push_rule page

Closes #3383

See merge request !2877

Remove ignore_column from GeoNode

See merge request !2777

`system_hook_id` was removed in gitlab-org/gitlab-ee!2644.

This removed the `ignore_column` from GeoNode. And will be merged in
a later release (= 10.1).

It was possible to grant access to a group to do things to protected
branches or tags, but if the group were deleted, the deletion
might fail due to a message such as the following:

```
ActiveRecord::InvalidForeignKey: PG::ForeignKeyViolation: ERROR:  update or delete on table "namespaces" violates foreign key constraint "fk_rails_7111b68cdb" on table "protected_branch_push_access_levels"
DETAIL:  Key (id)=(1827859) is still referenced from table "protected_branch_push_access_levels".
: DELETE FROM "namespaces" WHERE "namespaces"."type" IN ('Group') AND "namespaces"."id" = 1827859
```

This MR fixes this by adding missing cascading deletions to the
group_id foreign keys in the following tables:

* protected_branch_merge_access_levels
* protected_branch_push_access_levels
* protected_tag_create_access_levels

Closes #3343, #3344, gitlab-org/gitlab-ce#37311

Missing permitted param caused this field never to be saved.

Closes #3383

Docs: quick fix - indexes project settings

See merge request !2873

Update Helm Chart docs from CE - docs

Closes #3384

See merge request !2871

Add a unique index on project_id to the Geo project_registry table

Closes #3354

See merge request !2850

Add ce to ee instructions for 10.0

See merge request !2866

Docs new index for project's settings

See merge request !2870

Fix small typos in LDAP documentation

See merge request !2867

Docs new index for project's settings

Closes #35719

See merge request !13552

Show Geo event log and cursor data in node status page

See merge request !2681

Can migrate LFS objects to S3 style object storage

Closes #2841

See merge request !2760

Port of '32665-refactor-project-visibility-settings' to EE

See merge request !2860

Port "Improve "Share with group lock" feature for subgroups" to EE

See merge request !2853

Give Service Desk more prominence in the UI

Closes #3049

See merge request !2733

CE Upstream - Tuesday

Closes gitlab-ce#34261

See merge request !2828

Merge branch 'ce-37407-error-500-when-creating-a-project-createservice-returns-a-nil-object' into 'master'

Don't check license on namespace when it wasn't set yet.

Closes gitlab-ce#37407 and gitlab-com/support-forum#2409

See merge request !2854

Handle Geo DB replication lag as 24h/day & 7d/week

Closes #3298

See merge request !2833

Group issue boards

Closes #928

See merge request !2467

Merge branch 'ee-innerwhisper/gitlab-ce-31362_decrease_cyclomatic_complexity_threshold_step3' into 'master'

[EE] Port changes from gitlab-org/gitlab-ce!13972 to EE

See merge request !2843

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Resolve "Promote Issue/MR templates"

Closes #2977

See merge request !2803