### 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=(ARG_SUBDIR, ARG_OUTPUT, ARG_VERBOSE),
    ),
    ActionCommand(
        name="list-runs",
        help="List DAG runs given a DAG id",
        description=(
            "List DAG runs given a DAG id. If state option is given, it will only search for all the "
            "dagruns with the given state. If no_backfill option is given, it will filter out all "
            "backfill dagruns for given dag id. If start_date is given, it will filter out all the "
            "dagruns that were executed before this date. If end_date is given, it will filter out "
            "all the dagruns that were executed after this date. "
        ),
        func=lazy_load_command("airflow.cli.commands.dag_command.dag_list_dag_runs"),
        args=(
            ARG_DAG_ID_REQ_FLAG,
            ARG_NO_BACKFILL,
            ARG_DR_STATE,
            ARG_OUTPUT,
            ARG_VERBOSE,
            ARG_START_DATE,
            ARG_END_DATE,
        ),
    ),
    ActionCommand(
        name="list-jobs",
        help="List the jobs",
        func=lazy_load_command("airflow.cli.commands.dag_command.dag_list_jobs"),
        args=(ARG_DAG_ID_OPT, ARG_JOB_STATE, ARG_LIMIT, ARG_OUTPUT, ARG_VERBOSE),
    ),
    ActionCommand(