LU-18900 tests: skip sanity/24G for older servers

LU-18900 tests: skip sanity/24G for older servers

This patch skips sanity/24G for older servers that
do not support migrating symlink in rename.

Test-Parameters: trivial
Test-Parameters: testlist=sanity env=ONLY=24G serverversion=2.12
Fixes: 9adc02c016d2 ("LU-11631 mdd: migrate symlink for cross-MDT rename")

Change-Id: Ib576f669e6ce76fecd0a50ac7e5eef38d3c2727a
Signed-off-by: Jian Yu <yujian@whamcloud.com>
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/58715
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>