Upgrade to lucene-core 9.7.0
Notes on the upgrade path:
- RamIndexOutput is replaced with ResettableByteBuffersIndexOutput, an extension of ByteBuffersIndexOutput, which was the closest thing to a replacement of RamIndexOutput.
- Lucene exposes the code we needed from DirectReaders more or less directly in DirectReader now, so the old copied code has been deleted.
- Lucene changed its data files to be little endian, but to keep its compatibility story simple it retained BE for the header and footer ints. That's the cause of the changes in SAICodecUtils.
- We could gain a bit of performance making our own code natively little endian but that is too big of a change for this patch.
patch by Jonathan Ellis; reviewed by Andrés de la Peña, Caleb Rackliffe, and Mike Adamson for CASSANDRA-18494
22 files changed
