### 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)

gen->write_for();
				err = _parse_block(codegen, for_n->loop);
				if (err) {
					return err;
				}
				gen->write_endfor();
				codegen.end_block();
			} break;
			case GDScriptParser::Node::WHILE: {
				const GDScriptParser::WhileNode *while_n = static_cast<const GDScriptParser::WhileNode *>(s);
				gen->start_while_condition();
				GDScriptCodeGenerator::Address condition = _parse_expression(codegen, err, while_n->condition);
				if (err) {
					return err;
				}
				gen->write_while(condition);
				if (condition.mode == GDScriptCodeGenerator::Address::TEMPORARY) {
					codegen.generator->pop_temporary();
				}
				err = _parse_block(codegen, while_n->loop);
				if (err) {
					return err;
				}
				gen->write_endwhile();
			} break;
			case GDScriptParser::Node::BREAK: {
				gen->write_break();
			} break;
			case GDScriptParser::Node::CONTINUE: {
				const GDScriptParser::ContinueNode *cont = static_cast<const GDScriptParser::ContinueNode *>(s);