### Godot version

4.0 Beta10

### System information

Windows 10, Vulkan, GTX1060

### Issue description

`PropertyTweener`'s methods' return value are not discarded and effect the unary operator at next line.

In Editor:
![in_editor](https://user-images.githubusercontent.com/61624558/210715100-04bdf283-7954-4be3-94ca-338987b24c5b.png)


In cpp:
![in_cpp](https://user-images.githubusercontent.com/61624558/210715127-519f6d54-fc15-468f-9aca-ba7d387a5a7b.png)


### Steps to reproduce

Just run the Minimal reproduction project.

### Minimal reproduction project

[Bug Report.zip](https://github.com/godotengine/godot/files/10349829/Bug.Report.zip)

p_call->set_datatype(call_type);
			mark_node_unsafe(p_call);
			return;
		}
		GDScriptParser::IdentifierNode *base_id = nullptr;
		if (subscript->base->type == GDScriptParser::Node::IDENTIFIER) {
			base_id = static_cast<GDScriptParser::IdentifierNode *>(subscript->base);
		}
		if (base_id && GDScriptParser::get_builtin_type(base_id->name) < Variant::VARIANT_MAX) {
			base_type = make_builtin_meta_type(GDScriptParser::get_builtin_type(base_id->name));
		} else {
			reduce_expression(subscript->base);
			base_type = subscript->base->get_datatype();
		}
	} else {
		
		
		p_call->set_datatype(call_type);
		mark_node_unsafe(p_call);
		return;
	}
	bool is_static = false;
	bool is_vararg = false;
	int default_arg_count = 0;
	GDScriptParser::DataType return_type;
	List<GDScriptParser::DataType> par_types;
	bool is_constructor = (base_type.is_meta_type || (p_call->callee && p_call->callee->type == GDScriptParser::Node::IDENTIFIER)) && p_call->function_name == SNAME("new");
	if (get_function_signature(p_call, is_constructor, base_type, p_call->function_name, return_type, par_types, default_arg_count, is_static, is_vararg)) {
		
		for (const KeyValue<int, GDScriptParser::ArrayNode *> &E : arrays) {