LU-17578 lnet: fix &the_lnet.ln_mt_peerNIRecovq race

LU-17578 lnet: fix &the_lnet.ln_mt_peerNIRecovq race

To avoid race &the_lnet.ln_mt_peerNIRecovq must always be
accessed with lnet_net_lock(0) protection.

Test-Parameters: trivial
Fixes: da23037 ("LU-16563 lnet: use discovered ni status to set initial health")
Change-Id: Ic5e0194020200afdecba4cbf5afed274b14da388
Signed-off-by: Bruno Faccini <bfaccini@nvidia.com>
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/54163
Reviewed-by: Chris Horn <chris.horn@hpe.com>
Reviewed-by: Frank Sehr <fsehr@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Tested-by: jenkins <devops@whamcloud.com>