Filter SNVs, INDELs, CNVs and SVs

[fellen31]

Closes #329, calls it filtered instead of clinical_set to be a bit more general.

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[Schmytzi]

Good work but some things that should be adressed (mostly related to gawk)

[fellen31]

• Removed the HGNC: part in nallo.nf.
• Removed # from the header requirements and updated testdata (now hgnc_id).
• Check for both integer and string types in schema to match both e.g. 4826 and HGNC:4826.

[jemten]

Nice work! Had a couple of comments.

[jemten]

👍