LibJS: Skip ordinary_call_bind_this() when possible

If during parsing it was found that function won't use `this` then
there is no need to initialise `this_value` during call.

Userland/Libraries/LibJS/Runtime/ECMAScriptFunctionObject.h

@@ -164,6 +164,7 @@ private:
     bool m_arguments_object_needed { false };
     bool m_is_module_wrapper { false };
     bool m_function_environment_needed { false };
+    bool m_uses_this { false };
     Vector<VariableNameToInitialize> m_var_names_to_initialize_binding;
     Vector<DeprecatedFlyString> m_function_names_to_initialize_binding;