qipy run: add --list to list all binaries of a virtualenv

Change-Id: I97023e5d1843d298aa8d6fb3d6a410d7c950320f
Reviewed-on: http://gerrit.aldebaran.lan/41661
Tested-by: gerrit
Reviewed-by: dmerejkowsky <dmerejkowsky@aldebaran-robotics.com>