make disable fptl when clust a displayed option

make disable fptl when clust a displayed option

Assets/ScriptableRenderLoop/fptl/FptlLighting.cs

 
         // clustered light list specific buffers and data begin
         public bool enableClustered = false;
+        public bool disableFptlWhenClustered = false;    // still useful on opaques
-        const bool disableFptlWhenClustered = false;    // still useful on opaques
+        
         const int k_Log2NumClusters = 6;     // accepted range is from 0 to 6. NumClusters is 1<<g_iLog2NumClusters
         const float k_ClustLogBase = 1.02f;     // each slice 2% bigger than the previous
         float m_ClustScale;