Feature: Pull Base Image from private ACR

[marvinbuss]

Feature or Idea - What?

See here: https://docs.microsoft.com/en-us/azure/machine-learning/how-to-use-managed-identities?tabs=python#build-azure-machine-learning-managed-environment-into-base-image-from-private-acr-for-training-or-inference

Feature or Idea - Why?

Required for private base images.

Code of Conduct

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