LU-16868 tests: skip conf-sanity/66 in interop

LU-16868 tests: skip conf-sanity/66 in interop

Do not run conf-sanity.sh test_66* in interop testing.  Otherwise,
it is possible that the version of the test script running on the
client does not perform the upgrades with the right steps needed
for remote servers that are running a different version.

Lustre-change: https://review.whamcloud.com/52899
lustre-commit: TBD (from 774e626146ddcbeb527c0939e0210f92bab4c6c3)

Test-Parameters: trivial testlist=conf-sanity env=ONLY=66
Test-Parameters: testlist=conf-sanity env=ONLY=66 serverversion=2.12.9
Signed-off-by: Andreas Dilger <adilger@whamcloud.com>
Change-Id: I7b28b5f123a7348f87d43c54c806eaf6173ebbe5
Reviewed-on: https://review.whamcloud.com/c/ex/lustre-release/+/52900
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Alex Deiter <alex.deiter@gmail.com>