[tests][fix] Add premium NodeBalancer type annotation to UDP port e2e tests

[komer3]

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 73.39%. Comparing base (39b5474) to head (3952f0f).
⚠️ Report is 6 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #524   +/-   ##
=======================================
  Coverage   73.39%   73.39%           
=======================================
  Files          19       19           
  Lines        2902     2902           
=======================================
  Hits         2130     2130           
  Misses        523      523           
  Partials      249      249           

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