Add-support-for-SPV_NVX_raytracing

Test/spv.ClosestHitShader_Errors.rchit

@@ -0,0 +1,12 @@
+#version 460
+#extension GL_NVX_raytracing : enable
+hitAttributeNVX vec4 payload;                               
+layout(binding = 0, set = 0) uniform accelerationStructureNVX accNV;
+
+void main()
+{
+    payload.x = 1.0f;                                       // ERROR, cannot write to hitattributeNVX in stage
+    reportIntersectionNVX(1.0, 1U);                         // ERROR, unsupported builtin in stage 
+    terminateRayNVX();
+    ignoreIntersectionNVX();
+}