### 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)

prop_info.hint = export_info.hint;
					prop_info.hint_string = export_info.hint_string;
					prop_info.usage = export_info.usage | PROPERTY_USAGE_SCRIPT_VARIABLE;
				} else {
					prop_info.usage = PROPERTY_USAGE_SCRIPT_VARIABLE;
				}
#ifdef TOOLS_ENABLED
				p_script->doc_variables[name] = variable->doc_description;
#endif
				p_script->member_info[name] = prop_info;
				p_script->member_indices[name] = minfo;
				p_script->members.insert(name);
#ifdef TOOLS_ENABLED
				if (variable->initializer != nullptr && variable->initializer->is_constant) {
					p_script->member_default_values[name] = variable->initializer->reduced_value;
					GDScriptCompiler::convert_to_initializer_type(p_script->member_default_values[name], variable);
				} else {
					p_script->member_default_values.erase(name);
				}
				p_script->member_lines[name] = variable->start_line;
#endif
			} break;
			case GDScriptParser::ClassNode::Member::CONSTANT: {
				const GDScriptParser::ConstantNode *constant = member.constant;
				StringName name = constant->identifier->name;
				p_script->constants.insert(name, constant->initializer->reduced_value);
#ifdef TOOLS_ENABLED
				p_script->member_lines[name] = constant->start_line;
				if (!constant->doc_description.is_empty()) {
					p_script->doc_constants[name] = constant->doc_description;