Merge pull request #780 from Unity-Technologies/Branch_BakingSkySceneSettings

Added Baking Sky to scene setting creation menu item.

ScriptableRenderPipeline/HDRenderPipeline/HDRP/Editor/HDRenderPipelineMenuItems.cs

             var volume = sceneSettings.AddComponent<Volume>();
             volume.isGlobal = true;
             volume.sharedProfile = profile;
+
+            var bakingSky = sceneSettings.AddComponent<BakingSky>();
+            bakingSky.profile = volume.sharedProfile;
+            bakingSky.bakingSkyUniqueID = SkySettings.GetUniqueID<ProceduralSky>();
         }
 
         class DoCreateNewAsset<TAssetType> : ProjectWindowCallback.EndNameEditAction where TAssetType : ScriptableObject