cli/debug: Don't fetch /etc contents
cli/debug: Don't fetch /etc contents

Saving `/etc` was added to debug an integration test failure that ended
up being unrelated to the contents of `/etc`. Saving it is not
very useful, and would be difficult to implement on Kubernetes.

NetSys/quilt,NetSys/quilt,kelda/kelda,LuiseV/quilt,NetSys/quilt,NetSys/quilt,NetSys/quilt,quilt/quilt,quilt/quilt,kelda/kelda,quilt/quilt,kelda/kelda,LuiseV/quilt,LuiseV/quilt,kelda/kelda,quilt/quilt,LuiseV/quilt,LuiseV/quilt