Feature request: add clinvar_flag, clinvar_variant_id, and clinvar_variant_link to abridged output

[rjcorb]

Purpose/implementation Section

Briefly descibe the feature and provide meaningful references

Add additional clinvar columns to abridged output

What input data are required for this feature or analysis?

How do you plan to organise the feature or analysis - will it be a multi-function call or add to existing functions?

Who will complete the feature request (please add a GitHub handle here if relevant)?

@rjcorb