rust: split "qom" crate

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Zhao Liu <zhao1.liu@intel.com>
Link: https://lore.kernel.org/r/20250827104147.717203-13-marcandre.lureau@redhat.com
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
32 files changed