Support `delete.topic.enable` similar to Kafka

[rkruze]

Kafka has the ability to set delete.topic.enable on a per broker basis which will stop you from deleting a topic. We should support something similar.

JIRA Link: CORE-699

[dotnwat]

I assume that per-broker config here is a distraction, and this should be a cluster-level configuration setting? @rkruze

[rkruze]

Correct, this should be a cluster level config.

[piyushredpanda]

Closing out stale old ticket; if the issue is still relevant, please open this or a new ticket