[fix] cluster-autoscaler was pulling an incorrect image when setting up kubeadm-full

[prajwalvathreya]

What this PR does / why we need it:

• While setting up kubeadm-full, the cluster-autoscaler pulls in an incorrect image from registry.k8s.io
• The latest available version of cluster-autoscaler while creating this PR is v1.30.2 , while the specified version in the codebase was v9.37.0

Which issue(s) this PR fixes :

• Fixes the image pull error when creating the cluster-autoscaler pod

Special notes for your reviewer:

• Currently this fix hardcodes the version to v1.30.2
• To avoid further versioning issues, we could include a bash script in the manifest to fetch the current k8s version from the environment and plug that in

TODOs:

• squashed commits
• includes documentation
• adds unit tests
• adds or updates e2e tests

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 66.14%. Comparing base (e058793) to head (7d37444).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #437   +/-   ##
=======================================
  Coverage   66.14%   66.14%           
=======================================
  Files          76       76           
  Lines        3908     3908           
=======================================
  Hits         2585     2585           
  Misses       1131     1131           
  Partials      192      192           

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[cbzzz]

great moves, keep it up 🚽