Update ADAL dependency to MSAL

[localden]

Hi folks - I am a PM on the Microsoft Identity SDK team. I've noticed that the project takes a dependency on ADAL. This library will hit end-of-support by June of this year (2023) - the recommended path forward here is to update this to MSAL (there is a Python release).

What's the best path to make the change? This will affect the Azure token acquisition mechanism.

[brendandburns]

Kubernetes is deprecating in-tree authorization providers in favor of exec credentials, and Azure is moving to kubelogin https://github.com/Azure/kubelogin

I'm not sure this work is worth the effort, instead it probably makes more sense to just rip out the native Azure code in favor of the exec approach, which is the default for AKS going forward from 1.23.x anyway.

@roycaihw wdyt?

[yliaog]

that sounds right to me.

[brendandburns]

Ok, I will send a PR to remove this code from the client.

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/close not-planned

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@k8s-triage-robot: Closing this issue, marking it as "Not Planned".

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/close not-planned

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