Add support for async generator injections #1283

Job	Run time
Run tests with different pydantic versions	3m 12s
Run tests (3.8)	1m 58s
Run tests (3.10)	1m 52s
Run tests (3.9)	1m 54s
Run linters (pylint)	1m 33s
Run tests (3.11)	1m 49s
Run tests (3.12)	1m 51s
Run tests with coverage	2m 51s
Run linters (flake8)	1m 33s
Run linters (pydocstyle)	1m 30s
Run linters (mypy)	1m 46s
Run tests (3.13)	1m 58s
	23m 47s

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