chore: relocate owl bot post processor (#60)
chore: relocate owl bot post processor (#60)

Co-authored-by: Tianzi Cai <a51e53bb4cdbf2ef63c881551325c83dfc7a432c@google.com>
googleapis/java-pubsublite-flink,googleapis/java-pubsublite-flink,googleapis/java-pubsublite-flink