Forbid Sidekiq scheduling in transactions [EE]

See merge request !2024

Clarify license should be uploaded to the primary Geo node

See merge request !1947

[ci skip]

Scheduling jobs in transactions can lead to race conditions where a job
runs before a transaction has been committed. The added initializer
ensures the various Sidekiq scheduling methods raise an error when
called inside a transaction.

Fixes #27233

Backport gettext:compile Rake task to EE

See merge request !2022

Compare codeclimate artifacts on the merge request page

See merge request !1984

Add new Rake task to simplify the compilation of PO files

See merge request !11864

Geo: store clone URLs in GeoNode for the GeoLogCursor replication

Closes #2536

See merge request !2015

SystemCheck library (EE part)

See merge request !2019

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

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

MR approval placeholders same size as images

Closes #2491

See merge request !2007

Document how to create a migration for the Geo tracking DB

[ci skip]

See merge request !1994

CE Upstream - Monday

Closes gitlab-ce#32888 and gitlab-ce#32801

See merge request !1997