ipa-advise: configure pam_cert_auth=True for smart card on client
ipa-advise config-client-for-smart-card-auth is now using authselect
instead of authconfig, but authselect enable-feature with-smartcard
does not set pam_cert_auth=True in /etc/sssd/sssd.conf.
As a result, smart card auth on a client fails.
The fix adds a step in ipa-advise to configure pam_cert_auth=True.
The fix also forces the use of python3 interpreter, and handles
newer versions of SSSD which use OpenSSL instead of NSS (the trusted
CA certs must be put into /etc/sssd/pki/sssd_auth_ca_db.pem
Fixes https://pagure.io/freeipa/issue/7532
Reviewed-By: Rob Crittenden <rcritten@redhat.com>