[VOTE] PIP-253 Expose producer metrics for deadLetterProducer and retryLetterProducer

[Kai Levy]

Hello,

This thread is to start a vote for PIP-253

Discussion: https://lists.apache.org/thread/570x5yodg0bog4thgtstrgkgpthxmgfd
Issue: https://github.com/apache/pulsar/issues/19698

Voting will be open at least 48 hours.

Thanks!
Kai