### 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)

append(p_source);
			append(idx);
		} break;
		default: {
			ERR_PRINT("Compiler bug: unresolved assign.");
			
			append_opcode(GDScriptFunction::OPCODE_ASSIGN);
			append(p_target);
			append(p_source);
		}
	}
}
void GDScriptByteCodeGenerator::write_assign(const Address &p_target, const Address &p_source) {
	if (p_target.type.kind == GDScriptDataType::BUILTIN && p_target.type.builtin_type == Variant::ARRAY && p_target.type.has_container_element_type()) {
		append_opcode(GDScriptFunction::OPCODE_ASSIGN_TYPED_ARRAY);
		append(p_target);
		append(p_source);
	} else if (p_target.type.kind == GDScriptDataType::BUILTIN && p_source.type.kind == GDScriptDataType::BUILTIN && p_target.type.builtin_type != p_source.type.builtin_type) {
		
		append_opcode(GDScriptFunction::OPCODE_ASSIGN_TYPED_BUILTIN);
		append(p_target);
		append(p_source);
		append(p_target.type.builtin_type);
	} else {
		append_opcode(GDScriptFunction::OPCODE_ASSIGN);
		append(p_target);
		append(p_source);
	}
}
void GDScriptByteCodeGenerator::write_assign_true(const Address &p_target) {