Common: Replace Result with C++23's std::expected.

Source/Core/DiscIO/CompressedBlob.cpp

@@ -5,6 +5,7 @@
 
 #include <algorithm>
 #include <cstring>
+#include <expected>
 #include <memory>
 #include <string>
 #include <utility>
@@ -210,7 +211,7 @@ static ConversionResult<OutputParameters> Compress(CompressThreadState* state,
   if (retval != Z_OK)
   {
     ERROR_LOG_FMT(DISCIO, "Deflate failed");
-    return ConversionResultCode::InternalError;
+    return std::unexpected{ConversionResultCode::InternalError};
   }
 
   const int status = deflate(&state->z, Z_FINISH);