LU-10391 lnet: change lnet_find_best_lpni to handle large NIDs

LU-10391 lnet: change lnet_find_best_lpni to handle large NIDs

Currently lnet_find_best_lpni() only handles small NID addresses
for the dst_nid. Change this to large NID address to allow IPv6
and other large address protocols.

Test-Parameters: trivial testlist=sanity-lnet
Test-Parameters: serverversion=2.12 serverdistro=el7.9 testlist=runtests
Test-Parameters: clientversion=2.12 testlist=runtests
Signed-off-by: James Simmons <jsimmons@infradead.org>
Change-Id: I23ef73f5955a3016262d096706d5cf00ffa4abda
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/49181
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Neil Brown <neilb@suse.de>
Reviewed-by: Chris Horn <chris.horn@hpe.com>
Reviewed-by: Frank Sehr <fsehr@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>