azurerm_kubernetes_cluster - add support for Defender Profile

[stephybun]

Closes #15063

Also removed all the ThreePointOh flags and unused expand/flatten funcs.

Ran tests locally in the alt subscription.

=== RUN   TestAccKubernetesCluster_microsoftDefender
=== PAUSE TestAccKubernetesCluster_microsoftDefender
=== CONT  TestAccKubernetesCluster_microsoftDefender
--- PASS: TestAccKubernetesCluster_microsoftDefender (1152.05s)

=== RUN   TestAccDataSourceKubernetesCluster_microsoftDefender
=== PAUSE TestAccDataSourceKubernetesCluster_microsoftDefender
=== CONT  TestAccDataSourceKubernetesCluster_microsoftDefender        
--- PASS: TestAccDataSourceKubernetesCluster_microsoftDefender (570.08s)

[tombuildsstuff]

LGTM 👍

[github-actions]

This functionality has been released in v3.3.0 of the Terraform Provider. Please see the Terraform documentation on provider versioning or reach out if you need any assistance upgrading.

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[github-actions]

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