Support subPath and mountOptions for AzureContainerApps

[LaylaLiu-gmail]

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This checklist is used to make sure that common guidelines for a pull request are followed.

Related command

az containerapp create --yaml
az containerapp update --yaml

General Guidelines

• Have you run azdev style <YOUR_EXT> locally? (pip install azdev required)
• Have you run python scripts/ci/test_index.py -q locally?

For new extensions:

• My extension description/summary conforms to the Extension Summary Guidelines.

About Extension Publish

There is a pipeline to automatically build, upload and publish extension wheels.
Once your pull request is merged into main branch, a new pull request will be created to update src/index.json automatically.
You only need to update the version information in file setup.py and historical information in file HISTORY.rst in your PR but do not modify src/index.json.

[azure-client-tools-bot-prd]

Hi @LaylaLiu-gmail,
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.

[yonzhan]

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

[Greedygre]

Please add following code to support test run in different locations:
self.cmd('configure --defaults location={}'.format(TEST_LOCATION))

The @ResourceGroupPreparer(location=TEST_LOCATION) above can only create a resource group in the incoming location. But the resources created in test will not set --location as the location where the resource group is located.