EnableShadowMask in FrameSettings (But shadowMaskSupport still disable by default)

ScriptableRenderPipeline/HDRenderPipeline/HDRP/RenderPipeline/FrameSettings.cs

         public bool enableMSAA = false;
         public MSAASamples msaaSampleCount { get; private set; }
 
-        public bool enableShadowMask = false;
+        public bool enableShadowMask = true;
 
         public LightLoopSettings lightLoopSettings = new LightLoopSettings();