Update 32 bit test images without alpha bits

tests/ImageSharp.Tests/Formats/Tga/TgaDecoderTests.cs

@@ -723,10 +723,8 @@ public class TgaDecoderTests
     {
         using (Image<TPixel> image = provider.GetImage(TgaDecoder.Instance))
         {
-            // Using here the reference output instead of the reference decoder,
-            // because the reference decoder does not ignore the alpha data here.
             image.DebugSave(provider);
-            image.CompareToReferenceOutput(ImageComparer.Exact, provider);
+            ImageComparingUtils.CompareWithReferenceDecoder(provider, image);
         }
     }
 

tests/Images/Input/Tga/32bit_no_alphabits.tga

@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:0aea1128a1bd7477dfa0d007a1eba25907be24847284c48a5f9fbd61bcea3cf0
-size 61522
+oid sha256:019315f9dcbe4516ecb15426a45c210d437e9ad152c8e1a0e80abe9449177e12
+size 235218

tests/Images/Input/Tga/32bit_rle_no_alphabits.tga

@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:98a198392bd527523f8649d6126af81e5a588ad7265dc3d48a1da7b5a6cb6ff7
-size 230578
+oid sha256:33954ae93b4c7d57f52965a9028e97119c546db1da255100c2903a2760c7479e
+size 76870