Workflow to concatenate fastqs from different lanes

It would be good to have a workflow which takes as input a collection with fastqs from different lanes and concatenate if needed samples from the same samples.

Start from the issue description and review existing Galaxy workflow conventions for collection inputs containing FASTQs from multiple lanes. Clarify how samples are identified and when concatenation is needed; done means a workflow accepts the collection and correctly combines FASTQs belonging to the same sample.

Written by the indexing model from the issue text.