Handle batch-apply-object requests in the replica

Add support for the batch-apply-object in the `PullReplicationFilter`
class, which is used by the replica node in a pull-replication setup.
Deserialise the json message into the appopriate class, and pass the
message for further processing to the relevant "action" class.

Bug: Issue 40015567
Change-Id: I069561ed21a9cc07e667590a6afd38b7706858d4