Merge tag 'pull-prop-20241215' of https://gitlab.com/rth7680/qemu into staging

Constify almost all struct Property

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* tag 'pull-prop-20241215' of https://gitlab.com/rth7680/qemu: (67 commits)
  docs: Constify all Property in examples
  tests/unit: Constify all Property
  hw/xen: Constify all Property
  hw/watchdog: Constify all Property
  hw/virtio: Constify all Property
  hw/vfio: Constify all Property
  hw/usb: Constify all Property
  hw/ufs: Constify all Property
  hw/tpm: Constify all Property
  hw/timer: Constify all Property
  hw/ssi: Constify all Property
  hw/sparc64: Constify all Property
  hw/sparc: Constify all Property
  hw/sd: Constify all Property
  hw/scsi: Constify all Property
  hw/s390x: Constify all Property
  hw/rx: Constify all Property
  hw/rtc: Constify all Property
  hw/riscv: Constify all Property
  hw/remote: Constify all Property
  ...

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>