[release-1.12] fix envtest setup flake

[k8s-infra-cherrypick-robot]

This is an automated cherry-pick of #4427

/assign nojnhuh

NONE

[nojnhuh]

/lgtm
/assign @mboersma

[k8s-ci-robot]

LGTM label has been added.

Git tree hash: 89bf601c50389f71058da536c9a57f6b00818b6a

[mboersma]

/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: mboersma

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[codecov]

Codecov Report

Attention: 3 lines in your changes are missing coverage. Please review.

Comparison is base (b510c2b) 59.77% compared to head (7c7ae3f) 59.76%.
Report is 1 commits behind head on release-1.12.

Files	Patch %	Lines
internal/test/env/env.go	0.00%	3 Missing ⚠️

Additional details and impacted files

@@               Coverage Diff                @@
##           release-1.12    #4428      +/-   ##
================================================
- Coverage         59.77%   59.76%   -0.01%     
================================================
  Files               192      192              
  Lines             19313    19316       +3     
================================================
  Hits              11544    11544              
- Misses             7140     7143       +3     
  Partials            629      629              

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[CecileRobertMichon]

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

[k8s-ci-robot]

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

In response to this:

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

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