[release-1.17] Remove northeurope from random region selection to be used for perf tests

[k8s-infra-cherrypick-robot]

This is an automated cherry-pick of #5358

/assign jackfrancis

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 52.40%. Comparing base (20610e5) to head (3913be1).
Report is 3 commits behind head on release-1.17.

Additional details and impacted files

@@              Coverage Diff              @@
##           release-1.17    #5360   +/-   ##
=============================================
  Coverage         52.40%   52.40%           
=============================================
  Files               273      273           
  Lines             29185    29185           
=============================================
  Hits              15294    15294           
  Misses            13090    13090           
  Partials            801      801           

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