airflow-ctl: `pools import` and `connections import` missing `--action-on-existing-key` option

[Leondon9]

Description

airflow-ctl variables import supports --action-on-existing-key (overwrite/fail/skip), but pools import and connections import hardcode action_on_existence=FAIL.

Use case/motivation

When re-importing pools or connections that already exist, the import always fails with no way to overwrite or skip. Users must manually delete existing entries before re-importing.

For connections, this is also a regression from Airflow 2 which had --overwrite.

Related issues

No response

Are you willing to submit a PR?

• Yes I am willing to submit a PR!

Code of Conduct

• I agree to follow this project's Code of Conduct

[amoghrajesh]

cc @bugraoz93