### 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_script->_base = nullptr;
	p_script->members.clear();
	
	HashMap<StringName, Variant> constants;
	for (const KeyValue<StringName, Variant> &E : p_script->constants) {
		constants.insert(E.key, E.value);
	}
	p_script->constants.clear();
	constants.clear();
	HashMap<StringName, GDScriptFunction *> member_functions;
	for (const KeyValue<StringName, GDScriptFunction *> &E : p_script->member_functions) {
		member_functions.insert(E.key, E.value);
	}
	p_script->member_functions.clear();
	for (const KeyValue<StringName, GDScriptFunction *> &E : member_functions) {
		memdelete(E.value);
	}
	member_functions.clear();
	if (p_script->implicit_initializer) {
		memdelete(p_script->implicit_initializer);
	}
	if (p_script->implicit_ready) {
		memdelete(p_script->implicit_ready);
	}
	p_script->member_functions.clear();
	p_script->member_indices.clear();
	p_script->member_info.clear();
	p_script->_signals.clear();
	p_script->initializer = nullptr;
	p_script->implicit_initializer = nullptr;