cmd/mgmt/device/impl: Add cut and pasteable command that can be used to view the STDERR of an app that failed to start
cmd/mgmt/device/impl: Add cut and pasteable command that can be used to
view the STDERR of an app that failed to start

Change-Id: Icc9074dd10ee1bbdf4575999c732dbedf7f31bf4

vanadium/go.ref,vanadium/go.ref,vanadium/go.ref,vanadium/go.ref,vanadium/go.ref,vanadium/go.ref