### 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 (HAS_BUILTIN_TYPE(p_source)) {
		if (IS_BUILTIN_TYPE(p_index, Variant::INT) && Variant::get_member_validated_indexed_getter(p_source.type.builtin_type)) {
			
			Variant::ValidatedIndexedGetter getter = Variant::get_member_validated_indexed_getter(p_source.type.builtin_type);
			append_opcode(GDScriptFunction::OPCODE_GET_INDEXED_VALIDATED);
			append(p_source);
			append(p_index);
			append(p_target);
			append(getter);
			return;
		} else if (Variant::get_member_validated_keyed_getter(p_source.type.builtin_type)) {
			Variant::ValidatedKeyedGetter getter = Variant::get_member_validated_keyed_getter(p_source.type.builtin_type);
			append_opcode(GDScriptFunction::OPCODE_GET_KEYED_VALIDATED);
			append(p_source);
			append(p_index);
			append(p_target);
			append(getter);
			return;
		}
	}
	append_opcode(GDScriptFunction::OPCODE_GET_KEYED);
	append(p_source);
	append(p_index);
	append(p_target);
}
void GDScriptByteCodeGenerator::write_set_named(const Address &p_target, const StringName &p_name, const Address &p_source) {