What happens if a Project that is linked to a PoolRepository gets moved to another Gitaly storage?

The way we do git object dedup, we end up with little clusters of Project SQL records that point to a PoolRepository in SQL. Any of the projects involved can end up being moved to another repository storage.

I think that the Project <-> PoolRepository relation needs to be severed when that happens. Does that happen already? If not, does it create a problem?

Tentatively adding to 11.9 milestone and the dedup epic. Don't know if anything needs to be fixed but the questions need to be answered at least.