Support for mixed Capture Methods

[apeltzer]

The current version of the pipeline supports "only" a single kit for all samples. We have the situation that people come here with "mixed" datasets (e.g. Agilent v3,v4,v5) and then require to analyze everything together. While this is not optimal, there is certainly at least a partial overlap between samples and we should support setting things up.

I assume something like a CSV file with <ID>\t<kit_type> should work as input if a mixed input is used.

[apeltzer]

Migrated to nf-core#3