Improve GitHub importer

Closes #27429

See merge request !12886

Allow projects to be started from a template

Closes #32420

See merge request !13108

Support group milestone references

Closes #34778

See merge request !13289

Set default options outside the raw_log method

See merge request !13346

Reset only migration models

Closes #36052

See merge request !13336

We had a lot of copied and pasted code, when the different elements were very
small and easy to get wrong.

Removes test for removed behavior

Add sidekiq metrics endpoint and add http server to sidekiq

See merge request !13082

Resolve "Navigation - Make contextual sidebar collapsible"

Closes #34028

See merge request !13281

add feature rename wiki title

Closes #27800

See merge request !10069

Bump gitlab-shell version to 5.8.0 to fix Git for Windows 2.14

See merge request !13344

The raw_log method is meant to become the Gitaly RPC boundary. By
setting the defaults before doing the RPC we keep the RPC
implementation simpler. We also sidestep the unfortunate subtleties of
what happens when options[:limit] is not set, or nil.

Gitaly needs to know where to find gitlab-shell

See merge request !13306

add star for action scope, in order to delete image from registry

Closes #26465

See merge request !13248

Improve various parts of Dashboard::ProjectsController

See merge request !13319

Circuitbreaker for storage paths

Closes #32207, #33117, gitlab-com/infrastructure#1946, and gitlab-com/infrastructure#1775

See merge request !11449

Fixed sidebar context header hover colors

Closes #35999

See merge request !13323