Fix HDRP Lit ignoring detail mask for detail normals.

Assets/ScriptableRenderPipeline/HDRenderPipeline/Material/Lit/LitDataInternal.hlsl

 
     #ifdef _DETAIL_MAP_IDX
         #ifdef SURFACE_GRADIENT
-        normalTS += detailNormalTS;
+        normalTS += detailNormalTS * detailMask;
         #else
         normalTS = lerp(normalTS, BlendNormalRNM(normalTS, detailNormalTS), detailMask);
         #endif