Replace "click" with "cliff"

[Rodolfo Alonso]

There are several scripts in the Neutron repository using "click" library. The preferred library in OpenStack is "cliff". The goal of this patch is to track this transition.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.opendev.org/c/openstack/neutron/+/852834

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.opendev.org/c/openstack/neutron/+/852841

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/c/openstack/neutron/+/852834
Committed: https://opendev.org/openstack/neutron/commit/8bf3eba1014bba4896c4654e932e7f7b8281925c
Submitter: "Zuul (22348)"
Branch: master

commit 8bf3eba1014bba4896c4654e932e7f7b8281925c
Author: Rodolfo Alonso Hernandez <email address hidden>
Date: Wed Aug 10 05:17:11 2022 +0200

    Migrate "migrate_names" to use "cliff"

    Partial-Bug: #1985049
    Change-Id: Ia03f5c983acd8354adfa2f5f42e6a3e91e940618

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/c/openstack/neutron/+/852841
Committed: https://opendev.org/openstack/neutron/commit/0b20fa66b7bc321e6be1475ffa8856eb043064df
Submitter: "Zuul (22348)"
Branch: master

commit 0b20fa66b7bc321e6be1475ffa8856eb043064df
Author: Rodolfo Alonso Hernandez <email address hidden>
Date: Wed Aug 10 05:49:01 2022 +0200

    Migrate "download_gerrit_change" to use "cliff"

    Partial-Bug: #1985049
    Change-Id: I3bf3f80967ccffc02f3b937725c7363461dab29f

[Brian Haley (brian-haley)]

Looks like neutron/cmd/ovn/ml2ovn_trace.py is left, which is a bigger ask, just adding that note here if anyone is looking.

[Rodolfo Alonso (rodolfo-alonso-hernandez)]

Hi Brian:

No, I never started the migration of this last file. If you want to finish it, that's perfect for me (and thank you!).

Regards.