Validate identity type on user-assigned identities

[bryan-cox]

What type of PR is this?
/kind bug

What this PR does / why we need it:
Validate the identity type is 'UserAssigned' when using user-assigned identities.

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 #4990

Special notes for your reviewer:

• cherry-pick candidate

TODOs:

• squashed commits
• includes documentation
• adds unit tests

Release note:

Identity type is required to be 'UserAssigned' when using user-assigned identities.

[k8s-ci-robot]

Hi @bryan-cox. Thanks for your PR.

I'm waiting for a kubernetes-sigs member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

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Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository.

[mboersma]

/ok-to-test

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 51.25%. Comparing base (cc3e8e9) to head (b3916a7).
Report is 10 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #5102      +/-   ##
==========================================
+ Coverage   51.17%   51.25%   +0.07%     
==========================================
  Files         273      273              
  Lines       24616    24648      +32     
==========================================
+ Hits        12597    12633      +36     
+ Misses      11234    11229       -5     
- Partials      785      786       +1     

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[bryan-cox]

/test pull-cluster-api-provider-azure-e2e

[bryan-cox]

/test pull-cluster-api-provider-azure-e2e-aks

[willie-yao]

/lgtm
/approve

[k8s-ci-robot]

LGTM label has been added.

Git tree hash: e22355d27e38f57051d3d1c1ec1dfe80263cec5f

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: willie-yao

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• OWNERS [willie-yao]

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[willie-yao]

Thanks again for working on this! 🚀