Moves project related queries for Usage Quotas to subfolder

What does this MR do and why?

This is a maintenancerefactor for files under Usage Quotas. This MR moves GQL files related to project application to a dedicated subfolder. I.e.

- ~/usage_quotas/storage/queries/
+ ~/usage_quotas/storage/project/queries/

This also moves relevant EE files, thus overall 4 files are moved (2 CE, 2 EE).

Follows after !145554 (merged)

MR acceptance checklist

Please evaluate this MR against the MR acceptance checklist. It helps you analyze changes to reduce risks in quality, performance, reliability, security, and maintainability.

Screenshots or screen recordings

No visual changes

Before and after should look identical, like:

How to set up and validate locally

Visit http://localhost:3000/gitlab-org/gitlab-test/-/usage_quotas and then, check that the page works under:

• display_cost_factored_storage_size_on_project_pages feature flag on and off
  rails c and then Feature.enable(:display_cost_factored_storage_size_on_project_pages) or Feature.disable(:display_cost_factored_storage_size_on_project_pages)
• FOSS and EE
  set FOSS_ONLY=1 or FOSS_ONLY=0 in your env, and then restart the GDK (docs)