darc delete-default-channel should allow for mass deletion

[mmitche]

• [ ] This issue is blocking
• [ ] This issue is causing unreasonable pain

delete-subscriptions and a few other commands have 'mass' modes, where they match inputs on a subset of parameters, confirm the deletion, and then mass delete. delete-default-channel is missing this functionality. This is somewhat annoying because deleting an entire set of default channels is reasonably common (cleaning up old flow). Suggest doing the following:

1. Add a new command delete-default-channels which does (use the same behavior as delete-subscriptions)r:

• Matches the input parameters on substring, except if --id is used.
• Add an --exact switch, and match on exact strings if passed.
• Add confirmation of delete, unless --quiet is passed

2. Redirect delete-default-channel to delete-default-channels and add a message about deprecation.

[markwilkie]

Added to the dependency flow epic.