porch cli: command to reject deletion proposal of published packagerevs

[natasha41575]

This adds a way to reject a proposal of deletion of a published package revision (i.e. change the lifecycle from DeletionProposed back to Published) via kpt alpha rpkg reject.

[mortent]

Using a flag on the propose-delete command seems inconsistent with the existing UX. I can think of two other alternatives that I think I like better:

• Let the reject command undo both proposed deletion and publishing. So the cli will just check the current state of the packagerevision and then chose to either move it back to draft or published.
• If we want a flag for reject a proposed deletion, add that flag to the reject command rather than the propose-delete command.

The third option if of course to just add a separate reject-delete command, but it seems a bit unnecessary.

[johnbelamaric]

Using the reject command for both seems like the better UX to me.

[natasha41575]

Using the reject command for both seems like the better UX to me.

Will do! Ty @johnbelamaric and @mortent for the suggestions