When running the vcf-info-annotator support input TSVs with multiple value columns

[susannasiebert]

This could easily be achieved by requiring the TSV to have a header and looking up the appropriate field using the info_field parameter (i.e. the header for the value column would need to match the INFO tag you want to use in your VCF).

Note, that this does not mean to add support for adding multiple INFO fields in one command run, just that the input TSV can have an arbitrary set of value columns.