[BUG] win_dns_client.get_dns_config interface naming issues.

Description
In the win_dns_client.get_dns_config is using the wrong wmi field for the interface name.

for all other parts of the module iface.NetConnectionID is used

Setup
currently, win_dns_client.get_dns_config is using iface.Description as the interface name when it should be using iface.NetConnectionID like everything else in this tool.

as an example of the differences in these see. the following code.

PS C:\WINDOWS\system32> $interfaces = Get-WmiObject Win32_NetworkAdapter
PS C:\WINDOWS\system32> $interfaces | foreach {
>> $friendlyname = $_ | Select-Object -ExpandProperty NetConnectionID
>> $name = $_ | Select-Object -ExpandProperty Description
>> "$friendlyname is $name"
>> }
Ethernet 3 is AnchorFree TAP-Windows Adapter V9
Ethernet 2 is TAP-Windows Adapter V9
 is Microsoft Kernel Debug Network Adapter
 is WAN Miniport (SSTP)
 is WAN Miniport (IKEv2)
 is WAN Miniport (L2TP)
 is WAN Miniport (PPTP)
 is WAN Miniport (PPPOE)
 is WAN Miniport (IP)
 is WAN Miniport (IPv6)
 is WAN Miniport (Network Monitor)
 is Hyper-V Virtual Switch Extension Adapter
vEthernet (Default Switch) is Hyper-V Virtual Ethernet Adapter
Ethernet is Intel(R) Ethernet Connection (7) I219-V
Wi-Fi is Intel(R) Wireless-AC 9560
 is Microsoft Wi-Fi Direct Virtual Adapter
 is Microsoft Wi-Fi Direct Virtual Adapter
Bluetooth Network Connection is Bluetooth Device (Personal Area Network)

Steps to Reproduce the behavior
Try and use the same interface id for win_dns_client.get_dns_servers and win_dns_client.get_dns_config when NetConnectionID and Descriptor do not line up.

Expected behavior
consistency.

Versions Report

Desktop:
    Salt Version:
               Salt: 3001.1

    Dependency Versions:
               cffi: 1.12.2
           cherrypy: 17.4.1
           dateutil: 2.8.0
          docker-py: Not Installed
              gitdb: 2.0.5
          gitpython: Not Installed
             Jinja2: 2.10.1
            libgit2: Not Installed
           M2Crypto: Not Installed
               Mako: 1.0.7
       msgpack-pure: Not Installed
     msgpack-python: 1.0.0
       mysql-python: Not Installed
          pycparser: 2.19
           pycrypto: Not Installed
       pycryptodome: 3.9.7
             pygit2: Not Installed
             Python: 3.7.4 (tags/v3.7.4:e09359112e, Jul  8 2019, 20:34:20) [MSC v.1916 64 bit (AMD64)]
       python-gnupg: 0.4.4
             PyYAML: 5.3.1
              PyZMQ: 18.0.1
              smmap: 2.0.5
            timelib: 0.2.4
            Tornado: 4.5.3
                ZMQ: 4.3.1

    System Versions:
               dist:
             locale: cp1252
            machine: AMD64
            release: 10
             system: Windows
            version: 10 10.0.19041 SP0

Additional context
Add any other context about the problem here.

Start at the win_dns_client.get_dns_config entry point and compare its interface-name lookup with win_dns_client.get_dns_servers and the other module paths that use iface.NetConnectionID. Reproduce with an interface whose NetConnectionID differs from Description, then verify both functions accept the same interface identifier and return consistent results.