Fixes to skymanager and decaldata lifted from p4

ScriptableRenderPipeline/HDRenderPipeline/HDRP/Material/Decal/DecalData.hlsl

 	texCoord.uv = texCoordDS.xy;
 #if _NORMALMAP
 	surfaceData.normalWS.xyz = mul((float3x3)_DecalToWorldR, SAMPLE_UVMAPPING_NORMALMAP(_NormalMap, sampler_NormalMap, texCoord, 1)) * 0.5f + 0.5f;
-	surfaceData.normalWS.w = totalBlend;
+	surfaceData.normalWS.w = surfaceData.baseColor.w;
-	surfaceData.mask = SAMPLE_TEXTURE2D(_MaskMap, sampler_MaskMap, texCoordDS.xy); 
-	surfaceData.mask.z = totalBlend;
+	surfaceData.mask = 2*(SAMPLE_TEXTURE2D(_MaskMap, sampler_MaskMap, texCoordDS.xy)); 
+	surfaceData.mask.z = surfaceData.baseColor.w;
 #endif
 
 }

ScriptableRenderPipeline/HDRenderPipeline/HDRP/Sky/SkyManager.cs

             UpdateSkyTypes();
             UpdateCurrentSkySettings(camera);
 
-            m_NeedUpdateBakingSky = m_BakingSkyRenderingContext.UpdateEnvironment(m_BakingSky, camera, sunLight, m_UpdateRequired, cmd);
+            m_NeedUpdateBakingSky = m_BakingSkyRenderingContext.UpdateEnvironment(m_BakingSky, camera, null, m_UpdateRequired, cmd);
             SkyUpdateContext currentSky = m_LightingOverrideSky.IsValid() ? m_LightingOverrideSky : m_VisualSky;
             m_NeedUpdateRealtimeEnv = m_SkyRenderingContext.UpdateEnvironment(currentSky, camera, sunLight, m_UpdateRequired, cmd);