feat: Set initial location when connecting subscribe streams

[tmdiep]

• Sets the InitialSubscribeRequest.initial_location field when reconnecting subscribe streams.
  • This speeds up reconnects by seeking to the next offset in the initial subscribe, rather than as a subsequent seek request.
  • Setting the initial location to COMMITTED_CURSOR also acknowledges the client's receipt of the RESET signal.
• Completes the handling of admin/out of band seeks.
• Removes the initial seek from all subscriber wrapper implementations. When dependent libraries (e.g. Spark, Kafka) are updated to a new release of this library, they will be updated to set the initial location for SubscriberBuilder.