### 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)

switch (p_new_type) {
		case Variant::BOOL:
			append_opcode(GDScriptFunction::OPCODE_TYPE_ADJUST_BOOL);
			break;
		case Variant::INT:
			append_opcode(GDScriptFunction::OPCODE_TYPE_ADJUST_INT);
			break;
		case Variant::FLOAT:
			append_opcode(GDScriptFunction::OPCODE_TYPE_ADJUST_FLOAT);
			break;
		case Variant::STRING:
			append_opcode(GDScriptFunction::OPCODE_TYPE_ADJUST_STRING);
			break;
		case Variant::VECTOR2:
			append_opcode(GDScriptFunction::OPCODE_TYPE_ADJUST_VECTOR2);
			break;
		case Variant::VECTOR2I:
			append_opcode(GDScriptFunction::OPCODE_TYPE_ADJUST_VECTOR2I);
			break;
		case Variant::RECT2:
			append_opcode(GDScriptFunction::OPCODE_TYPE_ADJUST_RECT2);
			break;
		case Variant::RECT2I:
			append_opcode(GDScriptFunction::OPCODE_TYPE_ADJUST_RECT2I);
			break;
		case Variant::VECTOR3:
			append_opcode(GDScriptFunction::OPCODE_TYPE_ADJUST_VECTOR3);
			break;
		case Variant::VECTOR3I: