This backports to CE changes that allow the recording of the
repository_type in the table lfs_objects_projects.

This is in order to allow future pruning of unreferenced LFS objects,
as we will need to know which repository to look in for the LFS pointer
file.

The EE MR that contains the original code and a full explanation of the
changes is
https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/13894

EE Issue https://gitlab.com/gitlab-org/gitlab-ee/issues/9490

Note that there was a lot of CE code changed in the EE MR because we
want to allow the wiki repository to also use LFS. See
https://gitlab.com/gitlab-org/gitlab-ce/issues/43721. As the wiki is
an unlicensed feature, a full backport is required to enable this.

Partially addresses #47424.

This adds counters for build artifacts and LFS objects, and moves
the preexisting repository_size and commit_count from the projects
table into a new project_statistics table.

The counters are displayed in the administration area for projects
and groups, and also available through the API for admins (on */all)
and normal users (on */owned)

The statistics are updated through ProjectCacheWorker, which can now
do more granular updates with the new :statistics argument.

This reverts commit 3e991230.

# Conflicts:
#	app/models/project.rb

In 8278b763 the default behaviour of annotation
has changes, which was causing a lot of noise in diffs. We decided in #17382
that it is better to get rid of the whole annotate gem, and instead let people
look at schema.rb for the columns in a table.

Fixes: #17382