smoketest: ipsec: T1441: adjust to latest VTI/XFRM interface changes
smoketest: ipsec: T1441: adjust to latest VTI/XFRM interface changes

Commit d768aee9 ("ipsec: T1441: Clean up vti-up-down script for XFRM interfaces")
removed a parameter from the updown scripts which is no longer necessary as
XFRM interfaces are superior to VTI interfaces b/c they use dynamic endpoints
by default.

vyos/vyos-1x,vyos/vyos-1x,vyos/vyos-1x,vyos/vyos-1x