### 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)

break;
#ifdef DEBUG_ENABLED
						} else {
							if (par_type.builtin_type == Variant::INT && p_call->arguments[i]->get_datatype().builtin_type == Variant::FLOAT && builtin_type != Variant::INT) {
								parser->push_warning(p_call, GDScriptWarning::NARROWING_CONVERSION, p_call->function_name);
							}
#endif
						}
					}
					if (types_match) {
						match = true;
						call_type = type_from_property(info.return_val);
						break;
					}
				}
				if (!match) {
					String signature = Variant::get_type_name(builtin_type) + "(";
					for (int i = 0; i < p_call->arguments.size(); i++) {
						if (i > 0) {
							signature += ", ";
						}
						signature += p_call->arguments[i]->get_datatype().to_string();
					}
					signature += ")";
					push_error(vformat(R"(No constructor of "%s" matches the signature "%s".)", Variant::get_type_name(builtin_type), signature), p_call);
				}
			}
			p_call->set_datatype(call_type);
			return;
		} else if (GDScriptUtilityFunctions::function_exists(function_name)) {