Add methbat methylation region calls as outliers

[dnil]

MethBat calls are soon in Nallo, as a tsv kind of similar to DROP RNA outliers. Will need a little research still what columns to save and display, but should be somewhat obvious from https://github.com/PacificBiosciences/MethBat/blob/main/docs/profile_guide.md#rare-methylation-analysis.

Two kinds of outlier regions so far: promoter and imprinting (nanoimprint?), part of the cpg_label.

Ideally there will be an HGNC id column, but if not the HGNC id and gene symbol can be parsed from the same label:

chr6	144007487	144008719	nanoimprint_PLAGL1_HGNC:9046
chr1	64419	65418	promoter_OR4F5_HGNC:14825

[northwestwitch]

When we need to add to that outliers pvalue monster query other things I think it will be time for me to retire..

[dnil]

Mm, it would make be a Good Thing to simplify it. We could go with more different tabs to make it easier to develop, but typically from the user side one rather wants as unified a view as possible. Step wise hard filters and ranking are also Good Things, helping not to have those kind of moster expressions at the very last moment.

[northwestwitch]

Let's remember to modify the routine for removing rna data from a case when we add new keys to the omics_files field, see here

[dnil]

@inemesb @fellen31 do we have some test case with current state output file examples?