Draft: Resolve "Follow up: FE: Storage project table - column sorting"

What does this MR do and why?

Allows sorting by all statistics columns in namespace Usage Quotas > Storage tab.

Resolves #389425

Screenshots or screen recordings

How to set up and validate locally

1. Open a group with many projects, then go to Usage Quotas > Storage tab (e.g. http://localhost:3000/groups/gitlab-instance-3d22f6d0/-/usage_quotas#storage-quota-tab)
2. Try sorting by different columns

If you projects have don't have values, here's a rails c script to populate it:

group = Group.find(<GROUP_ID>)
prng1 = Random.new()
group.projects.each do |p| 
 [:storage_size,
 :repository_size,
 :lfs_objects_size,
 :build_artifacts_size,
 :packages_size,
 :wiki_size,
 :snippets_size,
 :pipeline_artifacts_size,
 :uploads_size,
 :container_registry_size].each { |k| p.statistics[k] = prng1.rand(100).megabytes }
 p.statistics.save
 p.save
end
group.save

MR acceptance checklist

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