HDRenderPipeline: Update name of GetAmbientOcclusion / GetScreenSpaceAmbientOcclusion

ScriptableRenderPipeline/HDRenderPipeline/HDRP/Lighting/LightEvaluation.hlsl

     float3 indirectSpecularOcclusion;
 };
 
-void GetAmbientOcclusion(float2 positionSS, float NdotV, float perceptualRoughness, float specularOcclusionFromData, out AmbientOcclusionFactor aoFactor)
+void GetScreenSpaceAmbientOcclusion(float2 positionSS, float NdotV, float perceptualRoughness, float specularOcclusionFromData, out AmbientOcclusionFactor aoFactor)
 {
     // Note: When we ImageLoad outside of texture size, the value returned by Load is 0 (Note: On Metal maybe it clamp to value of texture which is also fine)
     // We use this property to have a neutral value for AO that doesn't consume a sampler and work also with compute shader (i.e use ImageLoad)
     aoFactor.indirectSpecularOcclusion  = lerp(_AmbientOcclusionParam.rgb, float3(1.0, 1.0, 1.0), min(specularOcclusionFromData, specularOcclusion));
 }
 
-void GetAmbientOcclusionMultibounce(float2 positionSS, float NdotV, float perceptualRoughness, float specularOcclusionFromData, float3 diffuseColor, float3 fresnel0, out AmbientOcclusionFactor aoFactor)
+void GetScreenSpaceAmbientOcclusionMultibounce(float2 positionSS, float NdotV, float perceptualRoughness, float specularOcclusionFromData, float3 diffuseColor, float3 fresnel0, out AmbientOcclusionFactor aoFactor)
 {
     // Use GTAOMultiBounce approximation for ambient occlusion (allow to get a tint from the diffuseColor)
     // Note: When we ImageLoad outside of texture size, the value returned by Load is 0 (Note: On Metal maybe it clamp to value of texture which is also fine)

ScriptableRenderPipeline/HDRenderPipeline/HDRP/Material/Lit/Lit.hlsl

     AmbientOcclusionFactor aoFactor;
     // Use GTAOMultiBounce approximation for ambient occlusion (allow to get a tint from the baseColor)
 #if 0
-    GetAmbientOcclusion(posInput.positionSS, preLightData.NdotV, bsdfData.perceptualRoughness, bsdfData.specularOcclusion, aoFactor);
+    GetScreenSpaceAmbientOcclusion(posInput.positionSS, preLightData.NdotV, bsdfData.perceptualRoughness, bsdfData.specularOcclusion, aoFactor);
-    GetAmbientOcclusionMultibounce(posInput.positionSS, preLightData.NdotV, bsdfData.perceptualRoughness, bsdfData.specularOcclusion, bsdfData.diffuseColor, bsdfData.fresnel0, aoFactor);
+    GetScreenSpaceAmbientOcclusionMultibounce(posInput.positionSS, preLightData.NdotV, bsdfData.perceptualRoughness, bsdfData.specularOcclusion, bsdfData.diffuseColor, bsdfData.fresnel0, aoFactor);
 #endif
 
     // Add indirect diffuse + emissive (if any) - Ambient occlusion is multiply by emissive which is wrong but not a big deal