Fix the reference IBL implementation

Assets/ScriptableRenderLoop/HDRenderLoop/Material/Lit/Lit.hlsl

                                 uint sampleCount = 2048)
 {
     float3 N        = bsdfData.normalWS;
+    float3 tangentX = bsdfData.tangentWS;
+    float3 tangentY = bsdfData.bitangentWS;
+
-
-    float3 tangentX, tangentY;
-    GetLocalFrame(N, tangentX, tangentY);
 
     for (uint i = 0; i < sampleCount; ++i)
     {
                                     float3 V, EnvLightData lightData, BSDFData bsdfData,
                                     uint sampleCount = 2048)
 {
-    float3 N = bsdfData.normalWS;
-    float NdotV = dot(N, V);
-    float3 acc  = float3(0.0, 0.0, 0.0);
+    float3 N        = bsdfData.normalWS;
+    float3 tangentX = bsdfData.tangentWS;
+    float3 tangentY = bsdfData.bitangentWS;
+    float  NdotV    = saturate(dot(N, V));
+    float3 acc      = float3(0.0, 0.0, 0.0);
+
-
-    float3 tangentX, tangentY;
-    GetLocalFrame(N, tangentX, tangentY);
 
     for (uint i = 0; i < sampleCount; ++i)
     {
                                     uint sampleCount = 2048)
 {
     float3 N        = bsdfData.normalWS;
-    float NdotV     = saturate(dot(N, V));
+    float3 tangentX = bsdfData.tangentWS;
+    float3 tangentY = bsdfData.bitangentWS;
+    float  NdotV    = saturate(dot(N, V));
-
-    float3 tangentX, tangentY;
-    GetLocalFrame(N, tangentX, tangentY);
 
     for (uint i = 0; i < sampleCount; ++i)
     {
 */
     diffuseLighting = float3(0.0, 0.0, 0.0);
 
-    weight = float2(0.0, 0.0);
+    weight = float2(0.0, 1.0);
 
 #else
     // TODO: factor this code in common, so other material authoring don't require to rewrite everything,