Require browser or TTY for authorization code flow
    
    Only attempt the authorization code flow when either we can launch a
    browser or there is a TTY.
    
    Otherwise users running in e.g. gitlab pipelines and expecting to use
    kerberos are seeing tracebacks, as input() fails to read.
    
    This would save users from seeing pointless logs, and a request would
    not be sent to SSO.
    
    JIRA: RHELCMP-13503