Implement initial version of cmd-nse-supplier-k8s

[denis-tingaikin]

Description

We need to implement the initial version of cmd-nse-supplier-k8s for topology aware scale-from-zero running of NSEs in response to NSC demand (see at sdk#892)

Implementation details

1. Change module name in https://github.com/networkservicemesh/cmd-nse-supplier-k8s/blob/main/go.mod
2. Implement the main function for cmd-nse-supplier-k8s. See at examples https://github.com/networkservicemesh/cmd-nse-icmp-responder & https://github.com/networkservicemesh/cmd-registry-k8s
   Note1: Endpoint should include only this additional functionality: https://github.com/networkservicemesh/sdk-k8s/blob/main/pkg/networkservice/common/createpod/server.go#L48
   Note2: All required parameters should be passed over env config.
3. Add imports.go file as in example https://github.com/networkservicemesh/cmd-nse-icmp-responder/tree/main/internal/pkg/imports
4. Update docker file as in example https://github.com/networkservicemesh/cmd-nse-icmp-responder/blob/main/Dockerfile and make sure that it can be build as lined in README.md

References

networkservicemesh/sdk#892