Made StandardMultilayerPBR hide a layer's property groups when that layer is disabled.

ATOM-14688 Disable Individual Layers

- Added new SetMaterialPropertyGroupVisibility functions to the material functors.
- Updated the MaterialFunctor::EditorContext to include parameters for handling material property group metadata.
- Updated the material inspector(s) to apply the property group visiblity changes from the material functor, to hide or show the property groups.
- Moved some code from MaterialPropertyDescriptor.h/cpp to a new MaterialDynamicMetadata.h/cpp, since these aren't really related to the MaterialPropertyDescriptor code. It's more for material functors to use.
- Also fixed the casing for the "GetMaterialPropertyValue_Image" lua function, since I was already in this code (ATOM-14793 "Fix Inconsistent Casing For LuaMaterialFunctorRuntimeContext")

Tested in MaterialEditor and in in the main Editor's MaterialComponent property override inspector.

Gems/Atom/RPI/Code/Source/RPI.Reflect/Material/MaterialPropertyDescriptor.cpp

@@ -124,12 +124,6 @@ namespace AZ
                     ->Value(ToString(MaterialPropertyOutputType::ShaderOption), MaterialPropertyOutputType::ShaderOption)
                     ;
 
-                serializeContext->Enum<MaterialPropertyVisibility>()
-                    ->Value("Enabled", MaterialPropertyVisibility::Enabled)
-                    ->Value("Disabled", MaterialPropertyVisibility::Disabled)
-                    ->Value("Hidden", MaterialPropertyVisibility::Hidden)
-                    ;
-
                 serializeContext->Enum<MaterialPropertyDataType>()
                     ->Value(ToString(MaterialPropertyDataType::Invalid), MaterialPropertyDataType::Invalid)
                     ->Value(ToString(MaterialPropertyDataType::Bool), MaterialPropertyDataType::Bool)
@@ -153,14 +147,6 @@ namespace AZ
                     ;
             }
 
-            if (auto* behaviorContext = azrtti_cast<BehaviorContext*>(context))
-            {
-                behaviorContext
-                    ->Enum<(int)MaterialPropertyVisibility::Enabled>("MaterialPropertyVisibility_Enabled")
-                    ->Enum<(int)MaterialPropertyVisibility::Disabled>("MaterialPropertyVisibility_Disabled")
-                    ->Enum<(int)MaterialPropertyVisibility::Hidden>("MaterialPropertyVisibility_Hidden");
-            }
-
             MaterialPropertyIndex::Reflect(context);
         }