LU-16172 o2iblnd: add verbose debug prints for rx/tx events

LU-16172 o2iblnd: add verbose debug prints for rx/tx events

Added/modified debug messages for syncing with mlnx driver
debug output. On rx/tx events print message type, size and
peer credits. Make printing of debug message on o2iblnd conn
refcount change events compile-time optional. Add compile-time
option for dumping detailed connection state info to net debug log.

Test-Parameters: trivial testlist=sanity-lnet
Signed-off-by: Serguei Smirnov <ssmirnov@whamcloud.com>
Change-Id: If7c2de56d8e4ef71085c3b49caf589e2f3864b15
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/48600
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Chris Horn <chris.horn@hpe.com>
Reviewed-by: Frank Sehr <fsehr@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>