kata_proxy: Kill the proxy once we unregister the VM
kata_proxy: Kill the proxy once we unregister the VM

This really shows the need for a more symetric proxy API,
including a stop() routine.

Signed-off-by: Sebastien Boeuf <90b401417360b1924ef3f520ddee932686110f85@intel.com>
Signed-off-by: Samuel Ortiz <0ba86cb3f08bbb861958e54bd3438887adb4263c@linux.intel.com>

containers/virtcontainers,containers/virtcontainers