[release-1.12] fix HTTP 409 flake in AKS Cluster Class test

[k8s-infra-cherrypick-robot]

This is an automated cherry-pick of #4438

/assign nojnhuh

NONE

[mboersma]

/lgtm
/approve

[k8s-ci-robot]

LGTM label has been added.

Git tree hash: 4a91024089211d54479ebc8eda9a79cc4ae29791

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: mboersma

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (cce46c8) 59.76% compared to head (781be3a) 59.76%.
Report is 1 commits behind head on release-1.12.

Additional details and impacted files

@@              Coverage Diff              @@
##           release-1.12    #4445   +/-   ##
=============================================
  Coverage         59.76%   59.76%           
=============================================
  Files               192      192           
  Lines             19316    19316           
=============================================
  Hits              11544    11544           
  Misses             7143     7143           
  Partials            629      629           

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[willie-yao]

/retest

[nojnhuh]

Upgrade test failure matches #4422 and should be fixed when #4433 is incorporated into the release branch.

/override pull-cluster-api-provider-azure-apiversion-upgrade-v1beta1

[k8s-ci-robot]

@nojnhuh: Overrode contexts on behalf of nojnhuh: pull-cluster-api-provider-azure-apiversion-upgrade-v1beta1

In response to this:

Upgrade test failure matches #4422 and should be fixed when #4433 is incorporated into the release branch.

/override pull-cluster-api-provider-azure-apiversion-upgrade-v1beta1

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