[DurableTask] Creation of Durable Task CLI Extension

[RyanLettieri]

This is a PR for implementing the durabletask service extension into the azure python cli. It currently contains the following commands for both namespaces and taskhubs:

1. Create
2. List
3. Show
4. Delete

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• [ x] Have you run azdev style <YOUR_EXT> locally? (pip install azdev required)
• [ x] Have you run python scripts/ci/test_index.py -q locally? (pip install wheel==0.30.0 required)
• [x ] My extension version conforms to the Extension version schema

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Once your pull request is merged into main branch, a new pull request will be created to update src/index.json automatically.
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[azure-client-tools-bot-prd]

Validation for Breaking Change Starting...

Thanks for your contribution!

[azure-client-tools-bot-prd]

Hi @RyanLettieri,
Please write the description of changes which can be perceived by customers into HISTORY.rst.
If you want to release a new extension version, please update the version in setup.py as well.

[azure-client-tools-bot-prd]

Hi @RyanLettieri,
Since the current milestone time is less than 7 days, this pr will be reviewed in the next milestone.

[yonzhan]

Thank you for your contribution! We will review the pull request and get back to you soon.

[github-actions]

• For more info about extension versioning, please refer to Extension version schema

[github-actions]

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[kairu-ms]

Please add tests for the commands

[RyanLettieri]

Since our service is still in private preview and being finalized/stabilized, I don't believe we should have testing at this time due to the possibility of a failure occurring on the underlying service. Furthermore, subscriptions must be first registered and then approved for this service.

[azclibot]

[Release] Update index.json for extension [ durabletask ] : https://dev.azure.com/azclitools/release/_build/results?buildId=190332&view=results