[BatchAI] BatchAI module Knack conversion

[tjprescott]

Implements #4925. Tests to be re-enabled in future PR.

[azuresdkci]

View a preview at https://prompt.ws/r/Azure/azure-cli/5120
This is an experimental preview for @microsoft.com users.
(It may take a minute or two for your instance to be ready)
Email feedback to 'azfeedback' with subject 'Prompt Feedback'.

[AlexanderYukhanov]

The changes look fine to me. Is it already runnable, can I test it?

[derekbekoe]

@AlexanderYukhanov You should be able to visit https://prompt.ws/r/Azure/azure-cli/5120 to try it out! It takes a few mins to load your instance.

[derekbekoe]

What about the .flake8 file?

[derekbekoe]

$ az batchai cluster create -h

Command
    az batchai cluster create: Create a cluster.

Arguments
    --name -n        [Required]: Name of the cluster.
    --resource-group [Required]

RG has no description.

Same with some other commands such as:
az batchai cluster list -h
az batchai cluster resize -h
az batchai cluster auto-scale -h

[AlexanderYukhanov]

the help string for resource-group is missing from every command

[AlexanderYukhanov]

and '-g' now doesn't work

[tjprescott]

Thanks @AlexanderYukhanov, I fixed the issue with resource group.