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1. Collect deleted topics:
   1. Old format: /admin/delete_topics pulling the topic state from /brokers/topics/[topic].
   2. New in-memory topic deletion states from received DeleteTopicsRequest(s) 
2. Remove deleted topics from replicas by sending StopReplicaRequest V2 V1 for any topics which do not contain a topic ID, and V3 V2 for any topics which do contain a topic ID.
3. Finalize successful deletes:
   1. For /admin/delete_topics deletes, we may need to respond to the TopicDeleteRequest. We can also delete the topic znode at /admin/delete_topics/[topic] and /brokers/topics/[topic].
   2. For deletes for topics with topic IDs, remove the topic from the in memory topic deletion state on the controller.
4. Any unsuccessful StopReplicaRequest(s) will be retried after retryMs, starting from 1) and will be maintained in memory.

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