aks-preview 6.0.0b1

• [BREAKING CHANGE]: Remove support for az aks mesh egress gateway commands.
• Add validation to az aks create and az aks update while modifying the --ephemeral-disk-volume-type and --ephemeral-disk-nvme-perf-tier values.

SHA256 hashes of the release artifacts:

2e04cfef1cb404760006d73786c57259f8e5c92bc42b9eaca7314301ce0ba1a4 aks_preview-6.0.0b1-py2.py3-none-any.whl