Don't ingest into temporary registry

rhl writes:

we (KT?) made changes to the gen2 butler so that it picks up changes to the sqlite registry without reloading the butler. Can you cherry pick them if they're not already on PFS (and I think that they aren't, based on what I'm seeing at Subaru)

This is a reference to DM-23213 ("It's necessary to restart the butler to see newly ingested files"). That ticket introduced a bug which was fixed in DM-23342 ("Fix ingestDriver"). Because we're pinned to LSST 18.1.0 right now, we're going to have to copy the fixes into PFS land and play inheritance or monkey-patch games.