LU-16222 kernel: RHEL 8.7 client and server support

LU-16222 kernel: RHEL 8.7 client and server support

This patch makes changes to support RHEL 8.7 release
with kernel 4.18.0-423.el8 for Lustre client and server.

Lustre-change: https://review.whamcloud.com/48879
Lustre-commit: 293844d132b79a1d256ed4200d5dbd8bb790bfb4

Test-Parameters: trivial fstype=ldiskfs \
clientdistro=el8.7 serverdistro=el8.7 testlist=sanity

Test-Parameters: trivial fstype=zfs \
clientdistro=el8.7 serverdistro=el8.7 testlist=sanity

Change-Id: Ie97ff67c9a5fbd46bc145ab559665dcbc630b4a0
Signed-off-by: Jian Yu <yujian@whamcloud.com>
Co-Authored-By: Alex Zhuravlev <bzzz@whamcloud.com>
Reviewed-on: https://review.whamcloud.com/c/ex/lustre-release/+/49000
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Minh Diep <mdiep@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>