Add better test image for uint rgba pixel type

tests/ImageSharp.Tests/TestImages.cs

@@ -1389,7 +1389,7 @@ public static class TestImages
         public const string UncompressedRgba = "Exr/Calliphora_uncompressed_rgba.exr";
         public const string UncompressedFloatRgb = "Exr/rgb_float32_uncompressed.exr";
         public const string UncompressedUintRgb = "Exr/Calliphora_uint32_uncompressed.exr";
-        public const string UintRgba = "Exr/rgba_uint_zip_compressed.exr";
+        public const string UintRgba = "Exr/rgba_uint_uncompressed.exr";
         public const string Zip = "Exr/Calliphora_zip.exr";
         public const string Zips = "Exr/Calliphora_zips.exr";
         public const string Rle = "Exr/Calliphora_rle.exr";

tests/Images/External/ReferenceOutput/ExrDecoderTests/ExrDecoder_CanDecode_Uncompressed_Rgba_ExrPixelType_Uint_Rgba32_rgba_uint_uncompressed.png

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:107c6d26cdb8aac539011acf7213376e930cb705f5815b010b31ce4b9e738f9b
+size 25780

tests/Images/External/ReferenceOutput/ExrDecoderTests/ExrDecoder_CanDecode_Uncompressed_Rgba_ExrPixelType_Uint_Rgba32_rgba_uint_zip_compressed.png

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:843bea4db378f52935e2f19f60d289df8ebe20ddde3977c63225f1d58a10bd62
-size 48119

tests/Images/Input/Exr/rgba_uint_uncompressed.exr

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:0b45345cb1e4539e5298ccce3ccfc0f27b7a469836bfd7aa13c4d9f6c52baa7a
+size 482731

tests/Images/Input/Exr/rgba_uint_zip_compressed.exr

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:ff2ff1cdcfd219415430ba30a18962b54860d88bfc3adf337e97574c33c5e214
-size 119614