### 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)

if (builtin_method_map.has(p_method)) {
			return builtin_method_map[p_method];
		}
		int pos = builtin_method_map.size();
		builtin_method_map[p_method] = pos;
		return pos;
	}
	int get_constructor_pos(const Variant::ValidatedConstructor p_constructor) {
		if (constructors_map.has(p_constructor)) {
			return constructors_map[p_constructor];
		}
		int pos = constructors_map.size();
		constructors_map[p_constructor] = pos;
		return pos;
	}
	int get_utility_pos(const Variant::ValidatedUtilityFunction p_utility) {
		if (utilities_map.has(p_utility)) {
			return utilities_map[p_utility];
		}
		int pos = utilities_map.size();
		utilities_map[p_utility] = pos;
		return pos;
	}
	int get_gds_utility_pos(const GDScriptUtilityFunctions::FunctionPtr p_gds_utility) {