Update Galaxy's Rucio test and optional dependency declarations to require rucio-clients 40.2.0.
Adjust the Rucio object store for client 40 behavior, including checksum import changes, ingest checksum handling, Rucio config cache invalidation, and isolated download directories.
Run Rucio integration tests against the Savannah Rucio 40.2.0 container by default while keeping an environment override for the image.