* wip: make OpenID Connect free-for-all * Deprecation note: GoogleOAuth, Office365OAuth * Improve deprecation comments Co-authored-by: Martin Kraft <martin@upspin.org> * Lint fix * Add model/oauthproviders, move google, openid, office365 from enterprise * Vet fixes * Remove redundant log Co-authored-by: Martin Kraft <martin@upspin.org> Co-authored-by: Mattermod <mattermod@users.noreply.github.com>