fix #2227: enable totp codes to be passed in cli

fix #2227: enable totp codes to be passed in cli

this patch enables to pass totp codes during cluster join if tfa has
been enabled for root@pam (or any other user actually, but having it enabled on
root causes problems during cluster join).

u2f support is not yet implemented.

Co-developed-by: Thomas Lamprecht <t.lamprecht@proxmox.com>
Co-developed-by: Wolfgang Bumiller <w.bumiller@proxmox.com>
Signed-off-by: Oguz Bektas <o.bektas@proxmox.com>