Everywhere: Add sv suffix to strings relying on StringView(char const*)

Each of these strings would previously rely on StringView's char const*
constructor overload, which would call __builtin_strlen on the string.
Since we now have operator ""sv, we can replace these with much simpler
versions. This opens the door to being able to remove
StringView(char const*).

No functional changes.

Userland/Libraries/LibWeb/HTML/HTMLFormElement.cpp

@@ -167,7 +167,7 @@ static bool is_form_control(DOM::Element const& element)
     }
 
     if (is<HTMLInputElement>(element)
-        && !element.get_attribute(HTML::AttributeNames::type).equals_ignoring_case("image")) {
+        && !element.get_attribute(HTML::AttributeNames::type).equals_ignoring_case("image"sv)) {
         return true;
     }