Remove clear coat from the list of materials classified for precomputed illumination

ScriptableRenderPipeline/HDRenderPipeline/Material/Lit/Lit.hlsl

 // Combination need to be define in increasing "comlexity" order as define by FeatureFlagsToTileVariant
 static const uint kFeatureVariantFlags[NUM_FEATURE_VARIANTS] =
 {
-    // Precomputed illumination (no dynamic lights) for all material types
-    /*  0 */ LIGHTFEATUREFLAGS_SKY | LIGHTFEATUREFLAGS_ENV | MATERIAL_FEATURE_MASK_FLAGS,
+    // Precomputed illumination (no dynamic lights) for all material types (except for the clear coat)
+    /*  0 */ LIGHTFEATUREFLAGS_SKY | LIGHTFEATUREFLAGS_ENV | (MATERIAL_FEATURE_MASK_FLAGS & (~MATERIALFEATUREFLAGS_LIT_CLEAR_COAT)),
 
     // Standard>Specular
     /*  1 */ LIGHTFEATUREFLAGS_SKY | LIGHTFEATUREFLAGS_DIRECTIONAL | LIGHTFEATUREFLAGS_PUNCTUAL | MATERIALFEATUREFLAGS_LIT_STANDARD,