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>

Gems/Atom/Asset/ImageProcessingAtom/Code/Source/Processing/ImageFlags.h

@@ -19,7 +19,7 @@ namespace ImageProcessingAtom
     const static AZ::u32 EIF_Decal = 0x4;  // this is usually set through the preset
     const static AZ::u32 EIF_Greyscale = 0x8;  // hint for the engine (e.g. greyscale light beams can be applied to shadow mask), can be for DXT1 because compression artfacts don't count as color
     const static AZ::u32 EIF_SupressEngineReduce = 0x10;  // info for the engine: don't reduce texture resolution on this texture
-    const static AZ::u32 EIF_UNUSED_BIT = 0x40;  // Free to use
+    const static AZ::u32 EIF_HDR = 0x40;  // the image contains HDR data
     const static AZ::u32 EIF_AttachedAlpha = 0x400;  // deprecated: info for the engine: it's a texture with attached alpha channel
     const static AZ::u32 EIF_SRGBRead = 0x800;  // info for the engine: if gamma corrected rendering is on, this texture requires SRGBRead (it's not stored in linear)
     const static AZ::u32 EIF_DontResize = 0x8000; // info for the engine: for dds textures that shouldn't be resized

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,