Setup v4 and v6 allowing rules when using bridges

[hellt]

fix #2389

v4 rules were set up already, we were missing the v6 counterpart

[codecov]

Codecov Report

Attention: Patch coverage is 62.96296% with 40 lines in your changes missing coverage. Please review.

Project coverage is 51.97%. Comparing base (6257f4f) to head (4786047).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
runtime/docker/firewall/iptables/client.go	0.00%	32 Missing ⚠️
nodes/bridge/bridge.go	75.00%	2 Missing and 1 partial ⚠️
runtime/docker/firewall/nftables/client.go	92.50%	1 Missing and 2 partials ⚠️
runtime/docker/firewall.go	88.88%	1 Missing ⚠️
runtime/docker/firewall/firewall.go	66.66%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2401      +/-   ##
==========================================
+ Coverage   51.85%   51.97%   +0.11%     
==========================================
  Files         172      172              
  Lines       17380    17394      +14     
==========================================
+ Hits         9012     9040      +28     
+ Misses       7419     7412       -7     
+ Partials      949      942       -7     

Files with missing lines	Coverage Δ
runtime/docker/docker.go	69.42% <100.00%> (+0.75%)	⬆️
runtime/docker/firewall/nftables/rule.go	83.05% <100.00%> (+1.56%)	⬆️
runtime/docker/firewall.go	37.03% <88.88%> (+3.70%)	⬆️
runtime/docker/firewall/firewall.go	58.33% <66.66%> (ø)
nodes/bridge/bridge.go	65.71% <75.00%> (+3.36%)	⬆️
runtime/docker/firewall/nftables/client.go	76.41% <92.50%> (+7.76%)	⬆️
runtime/docker/firewall/iptables/client.go	0.00% <0.00%> (ø)