LU-17563 kernel: update SLES15 SP5 [5.14.21-150500.55.49.1]

LU-17563 kernel: update SLES15 SP5 [5.14.21-150500.55.49.1]

Update SLES15 SP5 kernel to 5.14.21-150500.55.49.1 for Lustre client.

Test-Parameters: trivial mdtcount=4 mdscount=2 \
  clientdistro=sles15sp5 testlist=sanity

Test-Parameters: optional clientdistro=sles15sp5 testgroup=full-part-1
Test-Parameters: optional clientdistro=sles15sp5 testgroup=full-part-2
Test-Parameters: optional clientdistro=sles15sp5 testgroup=full-part-3

Change-Id: I23868ff25ae093a52f004e556789805a644832ac
Signed-off-by: Jian Yu <yujian@whamcloud.com>
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/54240
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Yang Sheng <ys@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>