Remove usage of JobExplorer in BatchIntegrationConfiguration #4919
Description
The configuration of the batch integration module (mainly the remote partitioning setup) programmatically and through @EnableBatchIntegration currently requires both a job repository and a job explorer.
After #4824 , there is no need to configure a job explorer anymore. This issue is to remove the usage of JobExplorer in the BatchIntegrationConfiguration class and related APIs (RemotePartitioningManagerStepBuilder[Factory] and RemotePartitioningWorkerStepBuilder[Factory]).