refactor baremetal/proxy => baremetal/driver
refactor baremetal/proxy => baremetal/driver

Part of bp:virt-driver-cleanup

Make the baremetal driver consistent in naming as a driver
instead of a proxy / connection.

Change-Id: I75d7d90bd8139842b588f1fafb1267511f29a1fb

n0ano/gantt,n0ano/gantt