Use monotonic time in Sidekiq daemon memory killer
What does this MR do?
For MR16900 follow-up issue: #32217 (closed)
Use monotonic time in Sidekiq daemon memory killer
Instead of using `Time.now`, we should rely on monotonic time for
measuring deltas and operation timeout
https://blog.dnsimple.com/2018/03/elapsed-time-with-ruby-the-right-way