azurerm_kubernetes_cluster - Add support for OMS MSI authentication

[EppO]

Enable support for MSI authentication for OMS agent (https://learn.microsoft.com/en-us/azure/azure-monitor/containers/container-insights-enable-aks?tabs=azure-cli#migrate-to-managed-identity-authentication)

closes #20725

[katbyte]

Thanks for the PR @EppO - looks like there is a tes failure:

est ended in panic.

------- Stdout: -------
=== RUN   TestAccKubernetesCluster_addonProfileOMSToggle
=== PAUSE TestAccKubernetesCluster_addonProfileOMSToggle
=== CONT  TestAccKubernetesCluster_addonProfileOMSToggle

------- Stderr: -------
panic: oms_agent.0.msi_auth_for_monitoring_enabled: '' expected type 'bool', got unconvertible type 'string', value: 'false'

goroutine 376 [running]:
github.com/hashicorp/terraform-plugin-sdk/v2/helper/schema.(*ResourceData).Set(0xc001c3cd00, {0x6e3ff14, 0x9}, {0x60f0fe0, 0xc002b30480})

[stephybun]

Thanks for this @EppO. I left a few minor comments but once those are fixed up this should be good to go!

[stephybun]

Thanks @EppO - tests look good, just two minor comments then this should be good to merge.

[EppO]

Thanks @EppO - tests look good, just two minor comments then this should be good to merge.

Did the changes you suggested, do I need to rebase my branch?

[stephybun]

Thanks @EppO LGTM 🍉

[EppO]

Thanks @EppO LGTM 🍉

Thanks for your guidance @stephybun, really appreciated

[github-actions]

This functionality has been released in v3.47.0 of the Terraform Provider. Please see the Terraform documentation on provider versioning or reach out if you need any assistance upgrading.

For further feature requests or bug reports with this functionality, please create a new GitHub issue following the template. Thank you!

[github-actions]

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