filesystems/zerofs: Update to 2.3.5

Concurrent 9P client requests are now bounded and reply progress is
tracked per connection, and the kernel client gained recovery fixes
along with Linux 7.3 compatibility. Compaction repacking was
overhauled, its output data blocks are cached and the GC intervals
relaxed. Deku was replaced by explicit NBD and shared 9p slice codecs,
and frame encoding, segment uploads and metadata encoding do fewer
copies and allocations.

PR: 298643
Changes: https://github.com/Barre/ZeroFS/releases
Sponsored by: Netzkommune GmbH