protocol: add UserOrTeamID As*OrBust() methods
protocol: add UserOrTeamID As*OrBust() methods

Suggested by songgao.

Issue: #7046

keybase/client,keybase/client,keybase/client,keybase/client,keybase/client,keybase/client,keybase/client,keybase/client,keybase/client,keybase/client,keybase/client,keybase/client