Feature: allow IPv6 DNS

[olethanh]

Problem IPv6 DNS were automatically filtered when detected from resolvectl

Solution: Nameservers are now split into ipv4 and ipv6 and can be passed to the VM accordingly At the moment we pass them if the ipv6 parameter is present on the tap interface but we need a more robust detection method.

This is an alternative implementation of #378. As @odesenfans said in the other thread ideally , we should have the supervisor and runtime communicate to us if they support ipv6 and then only pass the ipv6 nameservers not sure if someone know a way to do that or if it's a new spec we should come up with? Also don't know if it's a blocker

[hoh]

This needs to be rebased on top of the current main branch.

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 60.86957% with 9 lines in your changes missing coverage. Please review.

Project coverage is 62.58%. Comparing base (089ccef) to head (c5f09cf). Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
src/aleph/vm/conf.py	58.82%	3 Missing and 4 partials :warning:
src/aleph/vm/controllers/firecracker/instance.py	60.00%	0 Missing and 2 partials :warning:

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #455      +/-   ##
==========================================
- Coverage   62.64%   62.58%   -0.06%     
==========================================
  Files          69       69              
  Lines        6131     6140       +9     
  Branches      490      496       +6     
==========================================
+ Hits         3841     3843       +2     
- Misses       2146     2147       +1     
- Partials      144      150       +6     

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