Only fetch repo once on secondary after push

See merge request !1015

We will use this hook name in future, but with a better implementation.

Add more push rules to the API

Closes #493 and #948

See merge request !1022

Remove a custom validation in the LDAP Group link API

Closes #972

See merge request !1026

Disable LDAP permission override in project members edit list

Closes #1475

See merge request !1018

The validation is now done by Grape since 16a8b5c6.
Signed-off-by: Rémy Coutable <remy@rymai.me>

Use EE build status badge in README

See merge request !1013

Expose issue weight on the API

Closes #749

See merge request !1023

Prevent 500 error when entering/uploading a license

See merge request !1016

Add tests to cycle analytics

See merge request !1019

Previously, if an admin clicked 'Upload license' without attaching
or entering a license, a 500 error would occur. Now, we check for
the right param. This also changed the render and return to a
redirect, which is more appropriate.

Closes #1475

ES doc. Add the explanation of what indexing option is

See merge request !1017

Currently, after a push we trigger the 'push' system hook on the
secondary for every ref. This hook performs `git fetch primary
--force`. When a repository with a large number of local refs is pushed
for the first time, git will then try to fetch the entire repository
once for every ref, generating a large amount of network and disk usage
for the temporary packfiles used during the fetch process.

In addition to this, if a fetch fails in the
`GeoRepositoryUpdateWorker`, its temporary packfile will remain present
until the next GC run.

To work around this, define a new 'fetch' hook type. Fake the system
hooks so that this is only called for secondary Geo nodes. Then remove
the fetching from the per-ref update step, and explicitly call the hook
once per push instead.

This means that there is a risk the update step will happen before the
fetch is finished, but it does stop the disk usage problem.

Make ES guide less confusing

Closes #1418

See merge request !992

Grapify the settings API

See merge request !1010

CE upstream

Closes #1451 and gitlab-ce#25827

See merge request !1000

Grapify the push rules API

See merge request !1005

Grapify the project git hooks API

See merge request !1006

Grapify the LDAP API

See merge request !1003

Grapify the LDAP group link API

See merge request !1002

About GitLab link in sidebar that links to help page

Closes gitlab-ce#24479

See merge request !1008

Grapify the license API

See merge request !1004