LU-14690 kernel: new kernel [RHEL 8.4 4.18.0-305.3.1.el8_4]

LU-14690 kernel: new kernel [RHEL 8.4 4.18.0-305.3.1.el8_4]

This patch makes changes to support new RHEL 8.4 release
for Lustre client.

Test-Parameters: trivial clientdistro=el8.4

Lustre-change: https://review.whamcloud.com/43725
Lustre-commit: f269497ac7a730880e590eb9e8405f082522c5e0

Test-Parameters: fortestonly
Change-Id: I47d4706f9175d489ef0e6226492af20f44f0677e
Signed-off-by: Jian Yu <yujian@whamcloud.com>
Removed libcfs/include/libcfs/linux/linux-net.h
Signed-off-by: Gian-Carlo DeFazio <defazio1@llnl.gov>
Reviewed-on: https://review.whamcloud.com/44173
Reviewed-by: Oleg Drokin <green@whamcloud.com>
Tested-by: Oleg Drokin <green@whamcloud.com>