LU-15196 kernel: kernel update RHEL8.4 [4.18.0-305.25.1.el8_4]

LU-15196 kernel: kernel update RHEL8.4 [4.18.0-305.25.1.el8_4]

Update RHEL8.4 kernel to 4.18.0-305.25.1.el8_4 for server support.

Test-Parameters: trivial fstype=ldiskfs \
clientdistro=el8.4 serverdistro=el8.4 testlist=sanity

Test-Parameters: trivial fstype=zfs \
clientdistro=el8.4 serverdistro=el8.4 testlist=sanity

Change-Id: If05ec88e37faa8d61881b3987a3364544e39f8a9
Signed-off-by: Jian Yu <yujian@whamcloud.com>
Reviewed-on: https://review.whamcloud.com/46343
Tested-by: jenkins <devops@whamcloud.com>
Reviewed-by: Minh Diep <mdiep@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>