LU-18902 tests: skip sanity/60g for older servers

LU-18902 tests: skip sanity/60g for older servers

This patch skips sanity/60g for older servers that
do not disable remote file statahead.

Test-Parameters: trivial
Test-Parameters: testlist=sanity env=ONLY=60g serverversion=2.12
Fixes: 02b5a407081c ("LU-11681 lmv: disable remote file statahead")

Change-Id: I7b26e9c0d8038db94bec3d2a006ec922457dec24
Signed-off-by: Jian Yu <yujian@whamcloud.com>
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/58718
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Rajeev Mishra <rajeevm@hpe.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>