qemu: Upgrade 7.2.0 -> 8.0.0

qemu: Upgrade 7.2.0 -> 8.0.0

Drop backported/merged patches:

  Revert-linux-user-add-more-compat-ioctl-definitions.patch
  configure-Fix-check-tcg-not-executing-any-tests.patch
  contrib-vhost-user-blk-Replace-lseek64-with-lseek.patch
  Revert-linux-user-fix-compat-with-glibc-2.36-sys-mou.patch

Drop socket chardev patch with conflicts:

  chardev-connect-socket-to-a-spawned-command.patch

This last patch was added in support of swtpm however it isn't clear if anyone
is still using that workflow. The patch uses API calls such as as qemu_fork()
which were removed in 8.0.0 and replaced with gspawn calls. If anyone needs the
patch, it will be better for them to forward port it, test it and reinstate it,
preferably with a discussion with upstream about it too.

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>