Deprecate vcf2genome --vcf2genome_outfile parameter

[TCLamnidis]

Meriam reported an issue with vcf2genome in the slack channel, where the output of one sample would overwrite the output of another. It turned out to be because of the parameter --vcf2genome_outfile which sets the output file name.

Removing this parameter fixed the issue, with each sample getting its own file. The parameter is therefore unintuitive and should be rethought if not deprecated.

[TCLamnidis]

Fixed by #1052