Originally submitted at
https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/2941.
Signed-off-by: NRémy Coutable <remy@rymai.me>

Originally submitted at
https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/5286.
Signed-off-by: NRémy Coutable <remy@rymai.me>

The pngquant tool was used https://pngquant.org, and particularly, the
following command:

        /usr/bin/pngquant -f --skip-if-larger --ext .png --speed 1 image.png

Before: 47584K
After : 34924K

This reverts commit 8717c7da.

This reverts commit 4d9a3f42, reversing
changes made to ecf9c145.

Digital Ocean Spaces currently needs v2 for downloads.

Closes #48622

Old behavior of creating TODO when
“Merge When Pipeline Succeeds” service fails, is generalized to:

Create a TODO whenever MR became unmergeable
(and similar to notification, MR author and merge_user are both applicable)

Display MR unmergeable reasons

LFS can be enabled and disabled per project using the API by Masters
and Owners, but the UI is only available to Admins. The interface and
API should be consistent.

LFS can also be enabled and disabled per group using the API by Owners,
but the UI is only available to Admins. This interface should also be
consistent.

Additionally removes an unneeded check if 2FA interface, since the
interface is only available to Owners.

Closes #33320

API can be used by project owners to disable LFS object verification
that will block pushes that contain LFS pointers but no the objects.