Add hg38 coordinates for CNV variants
Issue moved from ella-anno and the respective MR closed
Background
Background is that gnomAD v4 is only available in hg38 which causes a lot of manual copy-paste work for the users who still need to check their variants in the gnomAD webUI.
Implementation
As a compromise solution (until we moved entirely to hg38) we can lift over the hg19 coordinates to hg38 and add both the coordinates and a link to gnomAD v4 webUI as annotations in a vcf.
A good candidate tool is UCSC liftOver command-line tool, which is also used under the hood in Broad institute's liftover, the web service users currently use to get hg38 coordinates.
Details: keep chr, start and stop as separate records, e.g. chr_hg38, start_hg38, stop_hg38.
To show this in ELLA, the configs will have to be changed - to follow up once the feature in implemented.