LibWeb: Reset form association when the element's form attribute changes

Author: https://github.com/trflynn89
Commit: 960dcf0e56
Pull-request: https://github.com/SerenityOS/serenity/pull/23032
Issue: https://github.com/SerenityOS/serenity/issues/22537
Issue: https://github.com/SerenityOS/serenity/issues/22705
Issue: https://github.com/SerenityOS/serenity/issues/23008
Reviewed-by: https://github.com/ADKaster ✅
Reviewed-by: https://github.com/Lubrsi

Userland/Libraries/LibWeb/HTML/HTMLInputElement.cpp

@@ -833,9 +833,8 @@ void HTMLInputElement::did_lose_focus()
     commit_pending_changes();
 }
 
-void HTMLInputElement::attribute_changed(FlyString const& name, Optional<String> const& value)
+void HTMLInputElement::form_associated_element_attribute_changed(FlyString const& name, Optional<String> const& value)
 {
-    HTMLElement::attribute_changed(name, value);
     if (name == HTML::AttributeNames::checked) {
         if (!value.has_value()) {
             // When the checked content attribute is removed, if the control does not have dirty checkedness,