Atom/qingtao/image builder fixes (#6432)

* LYN-8837 o3de Material Editor - Texture Settings Editor - Hangs when converting texture (#6359)

Fixed a editor hanging issue when preview texture with astc format (starts multiple job threads inside a job thread)
Fixed an issue of changing texture setting didn't trigger image re-process.
Fixed an issue with image asset which has texture setting may have dependency with wrong preset
Added a EIF_HDR for source image in hdr format.
Fixed astc compression issue which may wrongly compress image to HDR astc format

Signed-off-by: Qing Tao <55564570+VickyAtAZ@users.noreply.github.com>
(cherry picked from commit d9f0a3012d)

* ATOM-16958 [Image Builder] Alpha data would be removed for source image with alpha content (#6412)

Fixed a regression issue with image builder which it can choose proper preset for images with alpha content.

Signed-off-by: Qing Tao <55564570+VickyAtAZ@users.noreply.github.com>
(cherry picked from commit b640f6d691)

Gems/Atom/Asset/ImageProcessingAtom/Code/Source/Processing/PixelFormatInfo.cpp

@@ -52,6 +52,24 @@ namespace ImageProcessingAtom
         return false;
     }
 
+    bool IsHDRFormat(EPixelFormat fmt)
+    {
+        switch (fmt)
+        {
+        case ePixelFormat_BC6UH:
+        case ePixelFormat_R9G9B9E5:
+        case ePixelFormat_R32G32B32A32F:
+        case ePixelFormat_R32G32F:
+        case ePixelFormat_R32F:
+        case ePixelFormat_R16G16B16A16F:
+        case ePixelFormat_R16G16F:
+        case ePixelFormat_R16F:
+            return true;
+        default:
+            return false;
+        }
+    }
+
     PixelFormatInfo::PixelFormatInfo(
         uint32_t    a_bitsPerPixel,
         uint32_t    a_Channels,