Editor HDR Color Grading Component implemented under the PostFx stack (#4159)

* Add HDR color grading pass and shaders.

* Remove color grading pass from light adaptation parent pass due to failing ASV tests. This will be added back later on.

* Editor HDR Color Grading Component implemented under the PostFx stack (#219)

* Add softmin/max for unbounded color grading properties.

* Revert channel mixer properties to vector3. Refactor mix to weight. Fix color grading pass to convert any color variable into vec4.

Signed-off-by: rbarrand <rbarrand@amazon.com>

Co-authored-by: Robin <rbarrand@amazon.com>

Gems/AtomLyIntegration/CommonFeatures/Code/Source/Module.cpp

@@ -24,6 +24,7 @@
 #include <OcclusionCullingPlane/OcclusionCullingPlaneComponent.h>
 #include <PostProcess/PostFxLayerComponent.h>
 #include <PostProcess/Bloom/BloomComponent.h>
+#include <PostProcess/ColorGrading/HDRColorGradingComponent.h>
 #include <PostProcess/DepthOfField/DepthOfFieldComponent.h>
 #include <PostProcess/DisplayMapper/DisplayMapperComponent.h>
 #include <PostProcess/ExposureControl/ExposureControlComponent.h>
@@ -57,6 +58,7 @@
 #include <OcclusionCullingPlane/EditorOcclusionCullingPlaneComponent.h>
 #include <PostProcess/EditorPostFxLayerComponent.h>
 #include <PostProcess/Bloom/EditorBloomComponent.h>
+#include <PostProcess/ColorGrading/EditorHDRColorGradingComponent.h>
 #include <PostProcess/DepthOfField/EditorDepthOfFieldComponent.h>
 #include <PostProcess/DisplayMapper/EditorDisplayMapperComponent.h>
 #include <PostProcess/ExposureControl/EditorExposureControlComponent.h>
@@ -93,6 +95,7 @@ namespace AZ
                         DecalComponent::CreateDescriptor(),
                         DirectionalLightComponent::CreateDescriptor(),
                         BloomComponent::CreateDescriptor(),
+                        HDRColorGradingComponent::CreateDescriptor(),
                         DisplayMapperComponent::CreateDescriptor(),
                         DepthOfFieldComponent::CreateDescriptor(),
                         ExposureControlComponent::CreateDescriptor(),
@@ -124,6 +127,7 @@ namespace AZ
                         EditorDecalComponent::CreateDescriptor(),
                         EditorDirectionalLightComponent::CreateDescriptor(),
                         EditorBloomComponent::CreateDescriptor(),
+                        EditorHDRColorGradingComponent::CreateDescriptor(),
                         EditorDepthOfFieldComponent::CreateDescriptor(),
                         EditorDisplayMapperComponent::CreateDescriptor(),
                         EditorExposureControlComponent::CreateDescriptor(),