### Body

The CLI:

`airflow variables set [-h] [-j] [-v] key VALUE`

https://airflow.apache.org/docs/apache-airflow/stable/cli-and-env-variables-ref.html#set_repeat1

Doesn't support adding description though column exists and we support it from Rest API:
https://airflow.apache.org/docs/apache-airflow/stable/stable-rest-api-ref.html#operation/post_variables

**The Task:**

Allow to set description from cli command

### Committer

- [X] I acknowledge that I am a maintainer/committer of the Apache Airflow project.
args=(),
    ),
]
if _ENABLE_AIP_44:
    core_commands.append(
        ActionCommand(
            name="internal-api",
            help="Start a Airflow Internal API instance",
            func=lazy_load_command("airflow.cli.commands.internal_api_command.internal_api"),
            args=(
                ARG_INTERNAL_API_PORT,
                ARG_INTERNAL_API_WORKERS,
                ARG_INTERNAL_API_WORKERCLASS,
                ARG_INTERNAL_API_WORKER_TIMEOUT,
                ARG_INTERNAL_API_HOSTNAME,
                ARG_PID,
                ARG_DAEMON,
                ARG_STDOUT,
                ARG_STDERR,
                ARG_INTERNAL_API_ACCESS_LOGFILE,
                ARG_INTERNAL_API_ERROR_LOGFILE,
                ARG_INTERNAL_API_ACCESS_LOGFORMAT,
                ARG_LOG_FILE,
                ARG_SSL_CERT,
                ARG_SSL_KEY,
                ARG_DEBUG,
            ),
        ),
    )
def _remove_dag_id_opt(command: ActionCommand):