[ironic] RFC: abandon sushy-cli?

Hi ironicers,

sushy-cli was an attempt to create a redfish CLI based on sushy. The effort stopped long ago, and the project hasn't had a single meaningful change since Ussuri. There is an official Redfish CLI from DMTF, I don't think we have cycles to maintain an alternative one.

If you would like to maintain sushy-cli, please speak up!

Dmitry