STASHDEV-7788 Include various statistics about remote operations in the HealthMonitor logging

STASHDEV-7788 Include various statistics about remote operations in the HealthMonitor logging.
Note this also revives https://github.com/atlassian/hazelcast/pull/4 which logs similar statistics for responses, but which did not make 3.3.2-atlassian-1.
`TimeUnit.NANOSECONDS.toMillis`? You're duplicating this logic in a few places now