v.dissolve: add column2 support for multi-column dissolve#7243

laasyapriya-code wants to merge 1 commit intoOSGeo:mainOSGeo/grass:mainfrom

laasyapriya-code:feature/vdissolve-multi-columnlaasyapriya-code/grass:feature/vdissolve-multi-columnCopy head branch name to clipboard