Removing a snapshot chainstate from disk (and memory) is consistent with
existing reindex operations.
This is a partial backport of [[https://github.com/bitcoin/bitcoin/pull/27596 | core#27596]]
https://github.com/bitcoin/bitcoin/pull/27596/commits/c711ca186f8d8a28810be0beedcb615ddcf93163
Depends on D17632