rust/qdev: Drop declare_properties & define_property macros

rust/qdev: Drop declare_properties & define_property macros

After HPET's #property conversion, there's no use case for
declare_properties & define_property. So get rid of them for now.

In future, if there's something that #property really cannot resolve,
they can be brought back.

Reviewed-by: Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
Signed-off-by: Zhao Liu <zhao1.liu@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Link: https://lore.kernel.org/r/20250920160520.3699591-13-zhao1.liu@intel.com