### 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.
func=lazy_load_command("airflow.cli.commands.provider_command.connection_field_behaviours"),
        args=(ARG_OUTPUT, ARG_VERBOSE),
    ),
    ActionCommand(
        name="logging",
        help="Get information about task logging handlers provided",
        func=lazy_load_command("airflow.cli.commands.provider_command.logging_list"),
        args=(ARG_OUTPUT, ARG_VERBOSE),
    ),
    ActionCommand(
        name="secrets",
        help="Get information about secrets backends provided",
        func=lazy_load_command("airflow.cli.commands.provider_command.secrets_backends_list"),
        args=(ARG_OUTPUT, ARG_VERBOSE),
    ),
    ActionCommand(
        name="auth",
        help="Get information about API auth backends provided",
        func=lazy_load_command("airflow.cli.commands.provider_command.auth_backend_list"),
        args=(ARG_OUTPUT, ARG_VERBOSE),
    ),
    ActionCommand(
        name="executors",
        help="Get information about executors provided",
        func=lazy_load_command("airflow.cli.commands.provider_command.executors_list"),
        args=(ARG_OUTPUT, ARG_VERBOSE),
    ),
    ActionCommand(
        name="notifications",
        help="Get information about notifications provided",