workflows: main.yml: Remove mysql service and update gn2 b/g task
workflows: main.yml: Remove mysql service and update gn2 b/g task

genenetwork/genenetwork2,zsloan/genenetwork2,genenetwork/genenetwork2,pjotrp/genenetwork2,pjotrp/genenetwork2,genenetwork/genenetwork2,zsloan/genenetwork2,pjotrp/genenetwork2,genenetwork/genenetwork2,pjotrp/genenetwork2,zsloan/genenetwork2,pjotrp/genenetwork2,zsloan/genenetwork2