test: don’t use removed AKS traefik extension

[jackfrancis]

What type of PR is this?

/kind failing-test

What this PR does / why we need it:

This PR removes the traefik AKS extension from our E2E tests, as that extension appears to no longer be available.

According to the logs:

traefik-proxy was removed from the marketplace for new purchase.

Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged):
Fixes #

Special notes for your reviewer:

TODOs:

• squashed commits
• includes documentation
• adds unit tests
• cherry-pick candidate

Release note:

NONE

[k8s-ci-robot]

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 53.27%. Comparing base (46be8d1) to head (de8071d).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #5646   +/-   ##
=======================================
  Coverage   53.27%   53.27%           
=======================================
  Files         272      272           
  Lines       29522    29522           
=======================================
  Hits        15729    15729           
  Misses      12978    12978           
  Partials      815      815           

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[jackfrancis]

@alimaazamat I'll close this PR in favor of yours, could you make one more update to your PR to include the doc updates so we no longer reference this removed extension?

thank you!