feat(firewall): display applied to resources when using label selector

[phm07]

This PR adds the ability to see which resources a Firewall is applied to when using a label selector.

Can only be merged once https://github.com/hetznercloud/hcloud-go/pull/667 is merged and released

[codecov[bot]]

Codecov Report

:white_check_mark: All modified and coverable lines are covered by tests. :white_check_mark: Project coverage is 70.35%. Comparing base (d8ebf37) to head (e33a135). :warning: Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1082      +/-   ##
==========================================
+ Coverage   70.31%   70.35%   +0.03%     
==========================================
  Files         244      244              
  Lines       10683    10695      +12     
==========================================
+ Hits         7512     7524      +12     
  Misses       2499     2499              
  Partials      672      672              

Flag	Coverage Δ
e2e	51.95% <57.89%> (+<0.01%)	:arrow_up:
unit	64.04% <100.00%> (+0.05%)	:arrow_up:

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