azurerm_kubernetes_cluster - fix several AKS tests

[stephybun]

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Description

• Removed test configs for 3.x
• Removed several tests that were testing the update of a ForceNew property
• Fixed test config for valid update tests that were triggering a ForceNew
• Updated the revision versions for the service mesh profile tests

There are still some test failures which require a deeper investigation since they're using special testing functionality to provision resources and dependencies outside of the test.

[jackofallops]

Thanks @stephybun - LGTM 🐒

[github-actions]

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