To add logic to enable either hns-stats plugin or ebpfwindows plugin in retina based on underlying networking stack

[vpidatala94]

To add logic to enable either hns-stats plugin or ebpfwindows plugin in Retina(PR being reviewed -- ebpfwindows-plugin by vpidatala94 · Pull Request #1468 · microsoft/retina) based on underlying networking stack

If clusters nodes are using legacy VFP stack - hns-stats plugin should be involved, otherwise ebpfwindows plugin