Add Windows WireGuard DNS support

[anjmao]

This PR adds support for setting DNS on Windows. Since on Windows to set DNS admin permissions are needed setting DNS also moved to supervisor when running in usermode.

Closes #1840

[codecov-commenter]

Codecov Report

Merging #2344 into master will increase coverage by 0.22%.
The diff coverage is 47.88%.

@@            Coverage Diff             @@
##           master    #2344      +/-   ##
==========================================
+ Coverage   48.05%   48.27%   +0.22%     
==========================================
  Files         280      280              
  Lines       12978    13069      +91     
==========================================
+ Hits         6236     6309      +73     
- Misses       6144     6153       +9     
- Partials      598      607       +9     

Impacted Files	Coverage Δ
core/connection/dns_option.go	48.97% <0.00%> (+3.69%)	⬆️
services/wireguard/endpoint/userspace/client.go	0.00% <0.00%> (ø)
services/wireguard/service/service_unix.go	21.33% <0.00%> (-0.89%)	⬇️
services/wireguard/connection/connection.go	69.69% <85.71%> (+3.03%)	⬆️
services/wireguard/wgcfg/device_config.go	87.23% <100.00%> (ø)
core/policy/oracle.go	86.48% <0.00%> (-5.41%)	⬇️
session/pingpong/consumer_balance_tracker.go	66.66% <0.00%> (-2.23%)	⬇️
nat/traversal/pinger.go	72.33% <0.00%> (-1.95%)	⬇️
tequilapi/endpoints/sse_handler.go	74.78% <0.00%> (+2.60%)	⬆️

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