[semantic-syntax-tests] Add test fixtures for `AwaitOutsideAsyncFunction` (#17785)
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Re: #17526
## Summary
Add test fixtures for `AwaitOutsideAsync` and
`AsyncComprehensionOutsideAsyncFunction` errors.
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## Test Plan
This is a test.
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ruff
178c8827 - [semantic-syntax-tests] Add test fixtures for `AwaitOutsideAsyncFunction` (#17785)
