fix!: ensure that generator clean up is correctly propagated #6056

Job	Run time
validate	20s
mypy	1m 4s
slotscheck	19s
pyright	37s
Test server integration (uvicorn<0.27.0)	51s
Test server integration (uvicorn>=0.27.0)	52s
Test Minimal Application with Base Dependencies	18s
test_typing_extensions (4.12.1)	18s
test_typing_extensions (4.13.1)	19s
test_typing_extensions (latest)	20s
test-platform-compat	0s
Test Minimal Pydantic 1 application	29s
test (3.9) / test	2m 26s
test (3.11) / test	1m 40s
test (3.12) / test	2m 25s
test (3.10) / test	1m 45s
test (3.13) / test	1m 58s
build-docs	2m 56s
test_success	3s
codeql	2m 17s
upload-test-coverage	21s
	21m 38s

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