[Azure] Update Azure NIC and NSG modules to support sovereign cloud environments#853

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mjyeaney wants to merge 2 commits intogruntwork-io:masterfrom aztfmod:miyean/network-sovereign

+93-22

Commits on Mar 15, 2021

Added client factory methods for nsg and network interface tests to enabled sovereign cloud support
Mike Yeaney
committed

Commits on Mar 17, 2021

Added comments to new client factory methods
Mike Yeaney
committed