gpio_etm_task_rm_gpio() function

- ESP_OK: Remove the GPIO from the ETM task successfully - ESP_ERR_INVALID_ARG: Remove the GPIO from the ETM task failed because of invalid argument - ESP_ERR_INVALID_STATE: Remove the GPIO from the ETM task failed because the GPIO is not controlled by this ETM task - ESP_FAIL: Remove the GPIO from the ETM task failed because of other reasons

Before deleting the ETM task, you need to remove all the GPIOs from the ETM task by this function Only GPIO ETM object can call this function