HDRenderPipeline: Fix issue with Metapass not working anymore

Assets/ScriptableRenderPipeline/HDRenderPipeline/ShaderPass/ShaderPassLightTransport.hlsl

 {
     VaryingsToPS output;
 
-    // OpenGL right now needs to actually use the incoming vertex position
-    // so we create a fake dependency on it here that haven't any impact.
-    output.vmesh.positionCS = float4(0.0, 0.0, inputMesh.positionOS.z > 0 ? 1.0e-4 : 0.0, 1.0);
+    // Output UV coordinate in vertex shader
+    float2 uv;
-    // Output UV coordinate in vertex shader
-        output.vmesh.positionCS.xy = inputMesh.uv1 * unity_LightmapST.xy + unity_LightmapST.zw;
+        uv = inputMesh.uv1 * unity_LightmapST.xy + unity_LightmapST.zw;
-        output.vmesh.positionCS.xy = inputMesh.uv2 * unity_DynamicLightmapST.xy + unity_DynamicLightmapST.zw;
+        uv = inputMesh.uv2 * unity_DynamicLightmapST.xy + unity_DynamicLightmapST.zw;
-    // TODO: Handle inversion ? See comment in albedoRender.cpp we maybe not have to flip here
-#if UNITY_UV_STARTS_AT_TOP
-    // ?
-#endif
-
-    output.vmesh.texCoord0 = inputMesh.uv0;
-    output.vmesh.texCoord1 = inputMesh.uv1;
+    // OpenGL right now needs to actually use the incoming vertex position
+    // so we create a fake dependency on it here that haven't any impact.
+    output.vmesh.positionCS = float4(uv * 2.0 - 1.0, inputMesh.positionOS.z > 0 ? 1.0e-4 : 0.0, 1.0);
+    output.vmesh.texCoord0  = inputMesh.uv0;
+    output.vmesh.texCoord1  = inputMesh.uv1;
 
 #if defined(VARYINGS_NEED_COLOR)
     output.vmesh.color = inputMesh.color;