An error occurs when executing "Deploy to Function App..." command with "+ Create new function app..." selected

[v-ruizh]

OS: Win 11 Build Version: 20250613.1 Regression: Previous Release

Repro Steps:

1. Create a Python project.
2. F1 -> Select "Azure Functions: Deploy to Function App..." -> Select "+ Create new function app..." to create a new Python function app to deploy.
3. Check whether no error occurs when executing "Deploy to Function App..." command with "+ Create new function app..." selected.

Expect: No error occurs when executing "Deploy to Function App..." command with "+ Create new function app..." selected.

Actual: An error occurs when executing "Deploy to Function App..." command with "+ Create new function app..." selected.

More Info:

1. This issue does not reproduce on the previous released Function extension v1.17.2.
2. This issue also reproduces on the current released Function extension v1.17.3.
3. This issue does not reproduce if selecting an existing function app to deploy.
4. This issue also reproduces when executing "Deploy to Azure..." command with "+ Create new function app..." selected.