radv: add RADV_DEBUG=noumr to disable UMR logs during GPU hang detection

Sometimes UMR logs can't be dumped and you would get permission
denied, even if the UMR binary has the setuid bit enabled.

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7706>

src/amd/vulkan/radv_debug.h

@@ -59,6 +59,7 @@ enum {
 	RADV_DEBUG_FORCE_COMPRESS    = 1 << 28,
 	RADV_DEBUG_HANG              = 1 << 29,
 	RADV_DEBUG_IMG               = 1 << 30,
+	RADV_DEBUG_NO_UMR            = 1 << 31,
 };
 
 enum {