Implemented support for semi-live previews of materials in the material property inspector.

Changed thumbnailer bus to use const pixmap
Changed capture request call back to use const pixmap instead of image
Replaced scene and pipeline members with constructor parameters
Added material preview renderer to editor material system component with new requests and notifications
Changed material property inspector details group to persistent heading so the preview image widget would not get destroyed during refreshes. But this was also a backlog task.
Changed common preview render camera to use lookat
Moved default asset caching to thumbnail renderer

Signed-off-by: Guthrie Adams <guthadam@amazon.com>

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

@@ -98,9 +98,9 @@ namespace AZ
 
         void EditorCommonFeaturesSystemComponent::Deactivate()
         {
-            AzToolsFramework::EditorLevelNotificationBus::Handler::BusDisconnect();
             AzFramework::ApplicationLifecycleEvents::Bus::Handler::BusDisconnect();
             AzFramework::AssetCatalogEventBus::Handler::BusDisconnect();
+            AzToolsFramework::EditorLevelNotificationBus::Handler::BusDisconnect();
             AzToolsFramework::AssetBrowser::PreviewerRequestBus::Handler::BusDisconnect();
 
             m_skinnedMeshDebugDisplay.reset();