Removal last CryTek references

- 'Crytek application' is now 'O3DE application' in ISystem.h
- 'CryTek' is now 'O3DE' in ProjectDefines.h (comment)
- 'Crytek Legacy' is now 'O3DE Legacy' in LocalizedStringManager.cpp
- 'Crytek extended data' references are now 'O3DE extended data'

Signed-off-by: spham <spham@amazon.com>

Gems/Atom/Asset/ImageProcessingAtom/Code/Source/ImageLoader/DdsLoader.cpp

@@ -414,7 +414,7 @@ namespace ImageProcessingAtom
 
             AZ::u32 marker = 0;
             fileLoadStream.Read(4, &marker);
-            if (marker == FOURCC_CExt) // marker for the start of Crytek Extended data
+            if (marker == FOURCC_CExt) // marker for the start of O3DE Extended data
             {
                 fileLoadStream.Read(4, &marker);
                 if (FOURCC_AttC == marker) // Attached Channel chunk
@@ -426,7 +426,7 @@ namespace ImageProcessingAtom
                     fileLoadStream.Read(4, &marker);
                 }
 
-                if (FOURCC_CEnd == marker) // marker for the end of Crytek Extended data
+                if (FOURCC_CEnd == marker) // marker for the end of O3DE Extended data
                 {
                     fileLoadStream.Read(4, &marker);
                 }