Introduce new test case which verifies that openvpn clients and servers
can run as Kata pods and can successfully establish a connection.
Volatile certificates and keys are generated by an initialization
container and injected into the client and server containers.
This scenario requires TUN/TAP support for the UVM kernel.
Signed-off-by: Manuel Huber <mahuber@microsoft.com>
Co-authored-by: Manuel Huber <manuelh@nvidia.com>
