builder/docker: perform cleanup in run method, not prematurely
builder/docker: perform cleanup in run method, not prematurely

Kaixiang/packer,TranscendComputing/packer,suma/packer,TranscendComputing/packer,suma/packer,suma/packer,Kaixiang/packer,Kaixiang/packer,TranscendComputing/packer,TranscendComputing/packer,Kaixiang/packer,suma/packer