[BUG] Batches are not prepended correctly when CTRL+C

[gabrielmbmb]

Describe the bug
When stopping a pipeline with CTRL+C, the batches from the step input queues are prepended back to the _BatchManager so no information is lost.

The _BatchManagerStep contains a data dictionary with batches from the predecessors steps, but when we're reingesting the batches from the input queue of a certain step, the batch.step_name is now equal to the step (not the predecessor step). This causes a KeyError exception.

Expected behaviour
The batch is added correctly back to the _BatchManagerStep and it can be used in the next pipeline execution if use_cache=True.