openai: fix json_schema mode in AzureChatOpenAI.with_structured_output #28941

Job	Run time
build	9s
cd ${{ matrix.job-configs.working-directory }} / make extended_tests #${{ matrix.job-configs.python-version }}	0s
test-doc-imports	0s
cd libs/partners/openai / poetry run pytest -m compile tests/integration_tests #3.8	28s
cd libs/partners/openai / poetry run pytest -m compile tests/integration_tests #3.12	29s
cd libs/langchain / poetry run pytest -m compile tests/integration_tests #3.8	50s
cd libs/langchain / poetry run pytest -m compile tests/integration_tests #3.12	19s
cd libs/langchain / dependency checks 3.12	10m 0s
cd libs/langchain / dependency checks 3.8	1m 2s
cd libs/partners/openai / dependency checks 3.12	43s
cd libs/partners/openai / dependency checks 3.8	44s
cd libs/langchain / make lint #3.12	30s
cd libs/langchain / make lint #3.8	42s
cd libs/partners/openai / make lint #3.12	25s
cd libs/partners/openai / make lint #3.8	28s
cd libs/langchain / make test #3.12	1m 10s
cd libs/langchain / make test #3.8	1m 17s
cd libs/partners/openai / make test #3.12	42s
cd libs/partners/openai / make test #3.8	45s
CI Success	1s
	20m 44s

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