tests: add test for uninstall with incomplete sysrestore.state
    
    Add a test that performs client uninstallation when sysrestore.state
    contains the header for the [authselect] section but does not
    contain a value for profile and features.
    
    Related to https://pagure.io/freeipa/issue/7657
    
    Reviewed-By: Rob Crittenden <rcritten@redhat.com>