Add inverse of "contains text separated by |" option

[fedarko]

This would make it possible to replicate "A / (everything that isn't A)"-style log-ratios, where A isn't just a single feature/taxon/etc.

I think this shouldn't be too difficult to finagle in the code -- would involve adding a negate parameter to orFilterFeatures() which would function similarly to the negate parameter of textFilterFeatures().

Forum xref: https://forum.qiime2.org/t/qurro-provide-a-list-of-taxa-to-exclude-from-selection/15291