[WIP] Add Azure Linux 3 test spec

[mboersma]

What type of PR is this?

/kind feature

What this PR does / why we need it:

Adds an Azure Linux 3 flavor to the templates and adds a test spec for the same.

Which issue(s) this PR fixes:

Refs #4832

Special notes for your reviewer:

• cherry-pick candidate

TODOs:

• squashed commits
• includes documentation
• adds unit tests

Release note:

NONE

[k8s-ci-robot]

Skipping CI for Draft Pull Request.
If you want CI signal for your change, please convert it to an actual PR.
You can still manually trigger a test run with /test all

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 52.51%. Comparing base (3ac9ff9) to head (5a74729).
Report is 6 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #5310   +/-   ##
=======================================
  Coverage   52.51%   52.51%           
=======================================
  Files         272      272           
  Lines       29431    29431           
=======================================
  Hits        15457    15457           
  Misses      13172    13172           
  Partials      802      802           

☔ View full report in Codecov by Sentry.
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[mboersma]

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

[k8s-ci-robot]

@mboersma: The following tests failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
pull-cluster-api-provider-azure-apiversion-upgrade	e80ac50	link	true	/test pull-cluster-api-provider-azure-apiversion-upgrade
pull-cluster-api-provider-azure-e2e-optional	5a74729	link	false	/test pull-cluster-api-provider-azure-e2e-optional

Full PR test history. Your PR dashboard. Please help us cut down on flakes by linking to an open issue when you hit one in your PR.

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[k8s-ci-robot]

PR needs rebase.

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