Cleanup Indirect lighting control

com.unity.render-pipelines.high-definition/HDRP/Editor/Lighting/IndirectLightingControlEditor.cs

     [VolumeComponentEditor(typeof(IndirectLightingControl))]
     public class IndirectLightingControlEditor : VolumeComponentEditor
     {
-        SerializedDataParameter m_IndirectSpecularIntensity;
+        SerializedDataParameter m_IndirectSpecularIntensity;
-            m_IndirectDiffuseIntensity = Unpack(o.Find(x => x.indirectDiffuseIntensity));
+            m_IndirectDiffuseIntensity = Unpack(o.Find(x => x.indirectDiffuseIntensity));
-            PropertyField(m_IndirectSpecularIntensity, CoreEditorUtils.GetContent("Indirect Specular Intensity|Multiplier for the reflected specular light."));
+            PropertyField(m_IndirectSpecularIntensity, CoreEditorUtils.GetContent("Indirect Specular Intensity|Multiplier for the reflected specular light."));
         }
     }
 }

com.unity.render-pipelines.high-definition/HDRP/Lighting/LightLoop/ShaderVariablesLightLoop.hlsl

     uint _NumTileClusteredX;
     uint _NumTileClusteredY;
 
-    float4 _IndirectLightingMultiplier;
-
     float4x4 _Env2DCaptureVP[MAX_ENV2D_LIGHT];
 
 #else

com.unity.render-pipelines.high-definition/HDRP/Lighting/ScreenSpaceLighting/ShaderVariablesScreenSpaceLighting.hlsl

 
     // Ambiant occlusion
     float4 _AmbientOcclusionParam; // xyz occlusion color, w directLightStrenght
+    
+    float4 _IndirectLightingMultiplier;
+    
 #else
     // Rough refraction texture
     // Color pyramid (width, height, lodcount, Unused)

com.unity.render-pipelines.high-definition/HDRP/Material/Lit/Lit.hlsl

     // Subsurface scattering mode
     float3 modifiedDiffuseColor = GetModifiedDiffuseColorForSSS(bsdfData);
 
+    // Apply volume indirect multipler
+    builtinData.bakeDiffuseLighting *= _IndirectLightingMultiplier.x;
+    lighting.indirect.specularReflected *= _IndirectLightingMultiplier.y;
+
-    diffuseLighting = modifiedDiffuseColor * lighting.direct.diffuse + builtinData.bakeDiffuseLighting * _IndirectLightingMultiplier.x;
+    diffuseLighting = modifiedDiffuseColor * lighting.direct.diffuse + builtinData.bakeDiffuseLighting;
 
     // If refraction is enable we use the transmittanceMask to lerp between current diffuse lighting and refraction value
     // Physically speaking, transmittanceMask should be 1, but for artistic reasons, we let the value vary
 
-    specularLighting = lighting.direct.specular + lighting.indirect.specularReflected * _IndirectLightingMultiplier.y;
+    specularLighting = lighting.direct.specular + lighting.indirect.specularReflected;
     // Rescale the GGX to account for the multiple scattering.
     specularLighting *= 1.0 + bsdfData.fresnel0 * preLightData.energyCompensation;