LU-15046 tests: skip sanity-flr/test_200c for old MDS

LU-15046 tests: skip sanity-flr/test_200c for old MDS

Skip sanity-flr test_200c for old MDS missing the fix
for synchronized replicas and its corresponding test.

Lustre-change: https://review.whamcloud.com/51649
Lustre-commit: TBD (from f152fe6e313843067c4c32299acf066d41896d61)

Fixes: b7ec0d2390 ("LU-15046 osp: precreate thread vs connect race")
Test-Parameters: trivial
Test-Parameters: testlist=sanity-flr env=ONLY=200c serverversion=2.14.0-ddn85
Test-Parameters: testlist=sanity-flr env=ONLY=200c serverversion=2.14.0-ddn89
Signed-off-by: Alex Deiter <adeiter@tintri.com>
Change-Id: I87cd7d6b767086f993a27ce6905b05f87e325474
Reviewed-on: https://review.whamcloud.com/c/ex/lustre-release/+/51613
Reviewed-by: Jian Yu <yujian@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>