Calculate PacBio filtered data percentage

[priyanka-surana]

Description of feature

Calculate the percentage of PacBio read data filtered before alignment. This was flagged by Kamil.

[tkchafin]

I think we can do this with MultiQC, which I would like to integrate anyways as a place to collect the reports as we start integrating QC options. Most up-to-date nf-core pipelines (for example viralrecon:dev ) have multiqc integration so hopefully won't be too much work