LU-18331 tests: skip sanityn/33e for older MDS

LU-18331 tests: skip sanityn/33e for older MDS

Skip sanityn test 33e for MDS < 2.15.56.127 since the test depends on
changes made to the MDS code on the server.

Test-Parameters: trivial testlist=sanityn env=ONLY=33e serverversion=2.15.5

Change-Id: I278af93165e928c03436489d90d72a766f27bdd7
Fixes: 2a78a9e2cd ("LU-15527 dne: refactor commit-on-sharing for DNE")
Signed-off-by: Jian Yu <yujian@whamcloud.com>
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/56622
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Li Xi <lixi@ddn.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>