fix!: ensure that generator clean up is correctly propagated #6055

Job	Run time
mypy	1m 7s
validate	20s
pyright	39s
Test server integration (uvicorn>=0.27.0)	43s
Test server integration (uvicorn<0.27.0)	52s
slotscheck	16s
test_typing_extensions (4.12.1)	17s
test_typing_extensions (4.13.1)	19s
Test Minimal Pydantic 1 application	37s
test_typing_extensions (latest)	21s
Test Minimal Application with Base Dependencies	20s
test (3.10) / test	2m 15s
test (3.9) / test	2m 50s
test (3.13) / test	1m 45s
test (3.11) / test	1m 49s
test (3.12) / test	2m 33s
test-platform-compat	0s
build-docs	2m 57s
test_success	3s
codeql	2m 20s
upload-test-coverage	20s
	22m 43s

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