LU-18298 tests: skip sanity-pcc/test_1{c,d} on SLES15 SP5

LU-18298 tests: skip sanity-pcc/test_1{c,d} on SLES15 SP5

Skip the sanity-pcc/test_1{c, d} failure on SLES15 SP3 - SP5.
However, they passed on SLES15 SP6.

Test-Parameters: trivial
Signed-off-by: Qian Yingjin <qian@ddn.com>
Change-Id: I08fd0a192307f0072cc82033958dd8239ea507d5
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/56809
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Tested-by: Jian Yu <yujian@whamcloud.com>
Reviewed-by: Jian Yu <yujian@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>