Sushant Mahajan

### What * Added ShareGroupMetrics inner class to SharePartitionManager. * Added code to record metrics at various checkpoints in code. ### Why * We want to record the shareAcknowledgement rate...

KAFKA-17367: Share coordinator impl. Broker side code. [2/N]

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* Added impl for `ShareCoordinatorService` and `ShareCoordinatorShard` * Moved `group-coordinator: GroupCoordinatorRuntimeMetrics` -> `coordinator-common: CoordinatorRuntimeMetricsImpl`. The new impl class can be inherited and used in both group and share coordinators. *...

* Few logs in `PersisterStateManager` were noisy and not adding much value. * For the sake of reducing pollution, they have been moved to debug level. * Additional debug log...