### 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)

int ret;
		if (!name_map.has(p_identifier)) {
			ret = name_map.size();
			name_map[p_identifier] = ret;
		} else {
			ret = name_map[p_identifier];
		}
		return ret;
	}
	int get_constant_pos(const Variant &p_constant) {
		if (constant_map.has(p_constant)) {
			return constant_map[p_constant];
		}
		int pos = constant_map.size();
		constant_map[p_constant] = pos;
		return pos;
	}
	int get_operation_pos(const Variant::ValidatedOperatorEvaluator p_operation) {
		if (operator_func_map.has(p_operation)) {
			return operator_func_map[p_operation];
		}
		int pos = operator_func_map.size();
		operator_func_map[p_operation] = pos;
		return pos;
	}
	int get_setter_pos(const Variant::ValidatedSetter p_setter) {