Fix: Warning in Cycles motion blur kernel features expression

This fixes the following warning with MSVC:
device_impl.cpp(287): warning C4805: '|=': unsafe mix of type 'bool' and type 'ccl::uint' in operation

The similar fix is applied to Metal code as well.

There is no short-circuiting boolean operator ||=, so expand the expression.

Pull Request: https://projects.blender.org/blender/blender/pulls/136561

intern/cycles/device/hiprt/device_impl.cpp

@@ -284,7 +284,7 @@ bool HIPRTDevice::load_kernels(const uint kernel_features)
    * This is necessary since objects may be reported to have motion if the Vector pass is
    * active, but may still need to be rendered without motion blur if that isn't active as well.
    */
-  use_motion_blur |= kernel_features & KERNEL_FEATURE_OBJECT_MOTION;
+  use_motion_blur = use_motion_blur || (kernel_features & KERNEL_FEATURE_OBJECT_MOTION);
 
   /* get kernel */
   const char *kernel_name = "kernel";