New links for cancer variants and fixes for the variants remove command

[4.26]

Added

• Extend the delete variants command to print analysis date, track, institute, status and research status
• Delete variants by type of analysis (wgs|wes|panel)
• Links to cBioPortal, MutanTP53, IARC TP53, OncoKB, MyCancerGenome, CIViC

Fixed

• Deleted variants count

Changed

• Print output of variants delete command as a tab separated table