LU-16214 kfilnd: Proactively handshake old peers

LU-16214 kfilnd: Proactively handshake old peers

If asked to send a message to a peer that we haven't communicated with
for some time, then we run the risk of that peer having a stale
(or missing) peer entry for us. This can result in the target peer
silently dropping our message. To reduce the chance of this happening
proactively handshake any peer we haven't talked to in the last 2x LND
timeouts.

Note, kfilnd_peer_needs_hello() is called on both the send and receive
path. We only want to proactively handshake on the send path, so an
argument is added to this function so it can distinguish between the
two situations.

HPE-bug-id: LUS-11125
Test-Parameters: trivial
Signed-off-by: Chris Horn <chris.horn@hpe.com>
Change-Id: Iaacb48e5c45305869bd22335ce112b21cf67e848
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/48786
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Ian Ziemba <ian.ziemba@hpe.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>
Reviewed-by: Ron Gredvig <ron.gredvig@hpe.com>