LU-9859 lnet: move expr parsing from libcfs

LU-9859 lnet: move expr parsing from libcfs

The expr parsing is used for lnet and lnet-related data, so move it
into lnet/lnet.

Signed-off-by: Mr NeilBrown <neilb@suse.de>
Change-Id: I4e65358babf6f522df6d7e9b3622c2b3e517bb7d
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/50845
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>
Reviewed-by: James Simmons <jsimmons@infradead.org>
Reviewed-by: Timothy Day <timday@amazon.com>