Add a bulk command option to process action without concurrency

Even if a bulk action is defined to support concurrency (up to the number of partitions in the stream) we may want to explicitly ask to run a bulk command without concurrency and still support parallel commands executions.

A use case can be to run a Bulk command with an Automation operation that needs to be run without concurrency like adding documents to a collection (which can cause concurrent update exception if done concurrently)