Merge tag 'pull-9p-20241128' of https://github.com/cschoenebeck/qemu into staging

* Fix open-unlink-fstat idiom on Linux guests.

* Add test to verify this behaviour.

* Cleanup patches.

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# gpg: Signature made Thu 28 Nov 2024 18:53:45 GMT
# gpg:                using RSA key 96D8D110CF7AF8084F88590134C2B58765A47395
# gpg:                issuer "qemu_oss@crudebyte.com"
# gpg: Good signature from "Christian Schoenebeck <qemu_oss@crudebyte.com>" [unknown]
# gpg: WARNING: This key is not certified with a trusted signature!
# gpg:          There is no indication that the signature belongs to the owner.
# Primary key fingerprint: ECAB 1A45 4014 1413 BA38  4926 30DB 47C3 A012 D5F4
#      Subkey fingerprint: 96D8 D110 CF7A F808 4F88  5901 34C2 B587 65A4 7395

* tag 'pull-9p-20241128' of https://github.com/cschoenebeck/qemu:
  tests/9p: also check 'Tgetattr' in 'use-after-unlink' test
  9pfs: fix 'Tgetattr' after unlink
  9pfs: remove obsolete comment in v9fs_getattr()
  tests/9p: add missing Rgetattr response name
  tests/9p: fix Rreaddir response name
  tests/9p: add 'use-after-unlink' test
  9pfs: cleanup V9fsFidState

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>