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/Layout/Node.cpp

@@ -592,7 +592,7 @@ String Node::debug_description() const
                 builder.appendff(".{}", class_name);
         }
     } else {
-        builder.append("(anonymous)");
+        builder.append("(anonymous)"sv);
     }
     return builder.to_string();
 }