Everywhere: Remove unintentional partial stream reads and writes

Author: https://github.com/timschumi
Commit: ae51c1821c
Pull-request: https://github.com/SerenityOS/serenity/pull/17684
Reviewed-by: https://github.com/JanDeVisser ✅
Reviewed-by: https://github.com/alimpfard
Reviewed-by: https://github.com/linusg ✅

Userland/Utilities/shot.cpp

@@ -167,8 +167,7 @@ ErrorOr<int> serenity_main(Main::Arguments arguments)
     }
 
     auto& file = *file_or_error.value();
-    // FIXME: This should write the entire span.
-    TRY(file.write_some(encoded_bitmap.bytes()));
+    TRY(file.write_until_depleted(encoded_bitmap.bytes()));
 
     if (edit_image)
         TRY(Core::Process::spawn("/bin/PixelPaint"sv, Array { output_path }));