### 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)

}
				Ref<Resource> res;
				if (class_node->identifier && class_node->identifier->name == identifier) {
					res = Ref<GDScript>(main_script);
				} else {
					String global_class_path = ScriptServer::get_global_class_path(identifier);
					if (ResourceLoader::get_resource_type(global_class_path) == "GDScript") {
						Error err = OK;
						res = GDScriptCache::get_full_script(global_class_path, err);
						if (err != OK) {
							_set_error("Can't load global class " + String(identifier), p_expression);
							r_error = ERR_COMPILATION_FAILED;
							return GDScriptCodeGenerator::Address();
						}
					} else {
						res = ResourceLoader::load(global_class_path);
						if (res.is_null()) {
							_set_error("Can't load global class " + String(identifier) + ", cyclic reference?", p_expression);
							r_error = ERR_COMPILATION_FAILED;
							return GDScriptCodeGenerator::Address();
						}
					}
				}
				return codegen.add_constant(res);
			}
#ifdef TOOLS_ENABLED
			if (GDScriptLanguage::get_singleton()->get_named_globals_map().has(identifier)) {
				GDScriptCodeGenerator::Address global = codegen.add_temporary(); 
				gen->write_store_named_global(global, identifier);
				return global;