LibWeb+LibJS: Format Console arguments with JS::Print

Instead of just calling JS::Value::to_string_without_side_effects() when
printing values to the console, have all the console clients use
the same JS::Print that the REPL does to print values.

This method leaves some things to be desired as far as OOM hardening
goes, however. We should be able to create a String in a way that
doesn't OOM on failure so hard.

Userland/Libraries/LibJS/Console.h

@@ -116,6 +116,8 @@ public:
     virtual void clear() = 0;
     virtual void end_group() = 0;
 
+    ThrowCompletionOr<String> generically_format_values(MarkedVector<Value> const&);
+
 protected:
     virtual ~ConsoleClient() = default;