add fuzzing and corpus testing to release process

[lrlna]

A mirror issue of the one in federation-next. I imagine once we figure it out for one the repositories, it'll be a bit more straightforward to copy it over.

As we add and continue to make improvements to the testing process, we should try to baking it in to the release process for the query planner. This should use cluster-fuzz and a form of corpus harness testing.