This updates the fluentbit configuration for tail inputs to remove
the values for utilizing mysqlite databases to track its location
in each file it's configured to tail. This is intended to reduce
the pressure fluentbit exerts on the host through writing to
/var/log/foo.db. To help mitigate large amounts of traffic
sent from fluentbit to fluentd upon a pod restart, this also
adds a throttle filter to fluentbit.
As a result, Fluentbit no longer needs a writable mount to its
hostPath on /var/log on the host. Thus, this change includes
updating the Fluentbit daemonset's mount on /var/log to be
readOnly
Change-Id: If4381f4ff47e887f3ea10beded4f6172edaf08ba
3614d025dc