[API] Fix URLs in the 'Link' header for 'GET /projects/:id/repository/contributors' when no value is passed for 'order_by' or 'sort'

Signed-off-by: Rémy Coutable <remy@rymai.me>

Closes #45247.

This could only be possible for users that can create merge requests
within a project.

So they need to be a allowed to create a branch and create a merge request.

This is useful for annotated tags, where the deferenced target is not the same as the tag object. At the moment there is no way to differentiate the two through the tag API.

This change adds a "target" property and leaves the existing "commit" property alone so that existing behaviour is not altered.

[10.6] Prevent notes on confidential issues from being sent to chat

See merge request gitlab/gitlabhq!2366
# Conflicts:
#	app/helpers/services_helper.rb

Repository archives are always named `<project>-<ref>-<sha>` even if
the ref is a commit. A consequence of always including the sha even
for tags is that packaging a release is more difficult because both
the ref and sha must be known by the packager.

- add append_sha option (defaults true) to provide a method for
toggling this feature.

Support added to GitLab Workhorse by gitlab-org/gitlab-workhorse!232

This means import data doesn't necessarily have to have an import_url
anymore.

The `ProjectImportData` could just contain the override data in it's
serialized data attribute.

The import data is automatically cleaned up after it is finished by
the state machine.

Features could be listed and added through the api, now also removed.
This was needed in the case of gitlab.com as the number of gates that
were ever used just grows and cleaning up is hard.

- Original work for the web interface here:
 - https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/13713

'/-/' delimiter is used only in UI, in API we don't use it for
other endpoints. To align search endpoints with the rest of API
endpoints, this patch makes '/-/' optional for existing endpoints (to
keep backward compatibility).

Documentation is updated to prefer paths without '/-/'.

and fixes the project description not being imported

When https is configured in the URL, also use that, and do not set it
to http.

Closes gitlab-org/gitlab-ee#5217