Add cri-containerd hostname tests
Add cri-containerd hostname tests

1. Adds a hostname test for a workload container in each of:
runhcs-wcow-process, runhcs-wcow-hypervisor, runhcs-lcow runtimes.

Signed-off-by: Justin Terry (VM) <f0c38945ef01caad6a7c3d4b90a29703264b34a4@microsoft.com>

Microsoft/hcsshim