MongoDB agent fixes #10278

Job	Run time
Python 3.8 extended tests	3m 14s
test with unpublished langchain - Python 3.8	1m 21s
Python 3.9 extended tests	3m 1s
Python 3.10 extended tests	2m 46s
Python 3.11 extended tests	2m 47s
test with unpublished langchain - Python 3.9	1m 11s
test with unpublished langchain - Python 3.10	1m 14s
test with unpublished langchain - Python 3.11	1m 11s
compile-integration-tests / Python 3.8	1m 27s
compile-integration-tests / Python 3.9	1m 19s
compile-integration-tests / Python 3.10	1m 22s
lint / build (3.8)	9s
compile-integration-tests / Python 3.11	1m 15s
lint / build (3.11)	12s
test / Python 3.8	2m 27s
test / Python 3.9	2m 27s
test / Python 3.10	1m 6s
test / Python 3.11	1m 1s
	29m 30s

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