ATOM-15939 Add support to capture attachment for ParentPass (#1887)

* ATOM-15939 Add support to capture attachment for ParentPass
- Moved the attachment read back support to Pass class so it supports both ParentPass and RenderPass.
- Added support to output input or output state of an InputOutput attachment.
- Enabled showing ParentPass attachments in PassTree tool.

Signed-off-by: Tao <qingtao@amazon.com>

Code/Editor/TrackView/AtomOutputFrameCapture.cpp

@@ -73,7 +73,7 @@ namespace TrackView
         bool startedCapture = false;
         AZ::Render::FrameCaptureRequestBus::BroadcastResult(
             startedCapture, &AZ::Render::FrameCaptureRequestBus::Events::CapturePassAttachmentWithCallback, m_passHierarchy,
-            AZStd::string("Output"), attachmentReadbackCallback);
+            AZStd::string("Output"), attachmentReadbackCallback, AZ::RPI::PassAttachmentReadbackOption::Output);
 
         return startedCapture;
     }