Expose {closed,merged}_{at,by} in merge requests API index

Closes #52031

See merge request gitlab-org/gitlab-ce!22806

Show expand all button on merge request diffs

Closes #51737

See merge request gitlab-org/gitlab-ce!22873

Fix environment status in merge request widget

Closes #51120 and #25140

See merge request gitlab-org/gitlab-ce!22799

Remove asset_sync gem and related code

Closes omnibus-gitlab#3872

See merge request gitlab-org/gitlab-ce!22610

Adds option to override commit email

Closes #43521

See merge request gitlab-org/gitlab-ce!22560

Touchup Normalizer implementation

See merge request gitlab-org/gitlab-ce!22872

Rewrite SnippetsFinder to improve performance

Closes #52639

See merge request gitlab-org/gitlab-ce!22606

This restores the behaviour of showing the expand all button on diffs
even when only a single file is collapsed.
Previously the button would only show when all files are collapsed.

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/51737

Bump Gitaly to 0.129.0

See merge request gitlab-org/gitlab-ce!22868

Enhance performance of counting local Uploads

Closes gitlab-ee#6070

See merge request gitlab-org/gitlab-ce!22522

The private commit email is automatically generated in the format:
id-username@noreply.HOSTNAME

GitLab instance admins are able to change the HOSTNAME portion,
that defaults to Gitlab's hostname, to whatever they prefer.

Comment on any expanded diff line on MRs

See merge request gitlab-org/gitlab-ce!22398

Copy changes for abuse clarity

Closes #51589

See merge request gitlab-org/gitlab-ce!22148

(EE Port) Assign approvers based on code owners

See merge request gitlab-org/gitlab-ce!22513

Fix broken link to Vagrant box

See merge request gitlab-org/gitlab-ce!22859

Resolve "`parallel` job keyword MVC"

Closes #21480

See merge request gitlab-org/gitlab-ce!22631

Now the files are identical again compared to EE.

These are backported from
https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/5050

Add an index to the `store` column on `uploads`. This makes counting
local uploads faster.

Also, there is no longer need to check for objects with `store = NULL`.
See https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/18557

---

### Query plans

Query:

```sql
SELECT COUNT(*)
FROM "uploads"
WHERE ("uploads"."store" = ? OR "uploads"."store" IS NULL)
```

#### Without index

```
gitlabhq_production=# EXPLAIN ANALYZE SELECT uploads.* FROM uploads WHERE (uploads.store = 1 OR uploads.store IS NULL);
                                                  QUERY PLAN
---------------------------------------------------------------------------------------------------------------
 Seq Scan on uploads  (cost=0.00..601729.54 rows=578 width=272) (actual time=6.170..2308.256 rows=545 loops=1)
   Filter: ((store = 1) OR (store IS NULL))
   Rows Removed by Filter: 4411957
 Planning time: 38.652 ms
 Execution time: 2308.454 ms
(5 rows)
```

#### Add index

```
gitlabhq_production=# create index uploads_tmp1 on uploads (store);
CREATE INDEX
```

#### With index

```
gitlabhq_production=# EXPLAIN ANALYZE SELECT uploads.* FROM uploads WHERE (uploads.store = 1 OR uploads.store IS NULL);
                                                          QUERY PLAN
-------------------------------------------------------------------------------------------------------------------------------
 Bitmap Heap Scan on uploads  (cost=11.46..1238.88 rows=574 width=272) (actual time=0.155..0.577 rows=545 loops=1)
   Recheck Cond: ((store = 1) OR (store IS NULL))
   Heap Blocks: exact=217
   ->  BitmapOr  (cost=11.46..11.46 rows=574 width=0) (actual time=0.116..0.116 rows=0 loops=1)
         ->  Bitmap Index Scan on uploads_tmp1  (cost=0.00..8.74 rows=574 width=0) (actual time=0.095..0.095 rows=545 loops=1)
               Index Cond: (store = 1)
         ->  Bitmap Index Scan on uploads_tmp1  (cost=0.00..2.44 rows=1 width=0) (actual time=0.020..0.020 rows=0 loops=1)
               Index Cond: (store IS NULL)
 Planning time: 0.274 ms
 Execution time: 0.637 ms
(10 rows)
```

Closes https://gitlab.com/gitlab-org/gitlab-ee/issues/6070

Add dynamic timer to delayed jobs

See merge request gitlab-org/gitlab-ce!22382

Fix links to product features

See merge request gitlab-org/gitlab-ce!22860

Remove gitlab-ui loading icon from global

See merge request gitlab-org/gitlab-ce!22724

Re-implemented image commenting on diffs

Closes #48956

See merge request gitlab-org/gitlab-ce!22443

Merge branch '52771-ldap-users-can-t-choose-private-or-internal-when-creating-a-new-group' into 'master'

Fix new group visibility form for non-admins

Closes #52771

See merge request gitlab-org/gitlab-ce!22468