support consumer.setAckIndex()

[AbelSara]

1. Please describe the feature you are requesting.
   I want a feature that I can control number of messages which should be sent back.
2. Provide any additional detail on your proposed use case for this feature.
   When consumer pull a batch of messages and one of them throw an exception, consumeMessage method will return RECONSUME_LATER and set ackIndex by consumer.setAckIndex(). ConsumeMessageCurrentlyService will receive this status and ackIndex property and send back messages which have not been consumed.
3. Indicate the importance of this issue to you (blocker, must-have, should-have, nice-to-have). Are you currently using any workarounds to address this issue?
   should-have.

[github-actions]

This issue is stale because it has been open for 365 days with no activity. It will be closed in 3 days if no further activity occurs.

[github-actions]

This issue was closed because it has been inactive for 3 days since being marked as stale.