Globally disable softhsm2 in p11-kit-proxy
    
    The p11-kit configuration injects p11-kit-proxy into all NSS databases.
    Amongst other p11-kit loads SoftHSM2 PKCS#11 provider. This interferes
    with 389-DS, certmonger, Dogtag and other services. For example certmonger
    tries to open OpenDNSSEC's SoftHSM2 token, although it doesn't use it at
    all. It also breaks Dogtag HSM support testing with SoftHSM2.
    
    IPA server does neither need nor use SoftHSM2 proxied by p11-kit.
    
    Related: https://pagure.io/freeipa/issue/7810
    Signed-off-by: Christian Heimes <cheimes@redhat.com>
    Reviewed-By: Alexander Bokovoy <abokovoy@redhat.com>