[Release 1.25] Migrate netutil methods into /utils/net.go

[manuelbuil]

Backport: #7422
Issue: #7430

[codecov]

Codecov Report

Patch and project coverage have no change.

Comparison is base (e679351) 9.91% compared to head (cb23cf0) 9.91%.

Additional details and impacted files

@@             Coverage Diff              @@
##           release-1.25   #7433   +/-   ##
============================================
  Coverage          9.91%   9.91%           
============================================
  Files               148     147    -1     
  Lines             10902   10902           
============================================
  Hits               1081    1081           
  Misses             9599    9599           
  Partials            222     222           

Flag	Coverage Δ
unittests	9.91% <0.00%> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
pkg/cli/agent/agent.go	0.00% <0.00%> (ø)
pkg/cli/server/server.go	0.00% <0.00%> (ø)
pkg/util/net.go	5.80% <0.00%> (-1.64%)	⬇️

☔ View full report in Codecov by Sentry.
📢 Do you have feedback about the report comment? Let us know in this issue.