Route webapp create stack configuration fix to Azure CLI core

[Copilot]

Related command

az webapp create

The selected App Service stack’s siteConfigPropertiesDictionary is not applied to the create payload. This repository’s webapp extension only contributes webapp scan commands; webapp create is implemented by Azure CLI’s core App Service module.

• Scope
  • No extension override added.
  • Required fix belongs in Azure/azure-cli where the create payload is constructed.

General Guidelines

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• Have you run python scripts/ci/test_index.py -q locally? (pip install azdev required)
• My extension version conforms to the Extension version schema

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• Fixes [webapp] az webapp create ignores siteConfigPropertiesDictionary from the selected App Service stack #10175

[azure-client-tools-bot-prd]

Hi Copilot,
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-pipelines]

Azure Pipelines:
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[Yong Zhang (yonzhan)]

webapp

[azure-client-tools-agent]

Live test skipped

⏭️ Skipping the live test for this revision because no new test file was added (tests/**/test_*.py).

The live-test pipeline runs only the test files a PR changes, so there is nothing to execute for this commit. This is informational — a regression test is encouraged where it makes sense, but not required. If a test file is added in a later commit, the live test will run automatically.

[azure-client-tools-agent]

CI Review Summary

All checks passed ✅ (2/2). The live-test tester was skipped because this PR does not change any test files (tests/**/test_*.py).

This PR looks good from an automation standpoint.