[WIP] Set up ci-entrypoint to work with AKS management cluster

[Jont828]

What type of PR is this?
/kind feature

What this PR does / why we need it:

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:

• cherry-pick candidate

TODOs:

• squashed commits
• includes documentation
• adds unit tests

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 52.78%. Comparing base (d1899f8) to head (4f51214).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #5241   +/-   ##
=======================================
  Coverage   52.77%   52.78%           
=======================================
  Files         270      270           
  Lines       29057    29057           
=======================================
+ Hits        15335    15337    +2     
+ Misses      12930    12928    -2     
  Partials      792      792           

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[k8s-ci-robot]

@Jont828: The following test 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-ci-entrypoint	4f51214	link	true	/test pull-cluster-api-provider-azure-ci-entrypoint

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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