Fix DOCX tables inside SDT content controls not being parsed #6654

Job	Run time
changes	16s
code-checks / changes	16s
code-checks / lint (3.10)	51s
code-checks / tach	13s
code-checks / run-tests-core (3.10)	11m 45s
code-checks / run-examples-light (3.10)	12m 7s
code-checks / run-tests-ml (3.10, vlm)	2m 8s
code-checks / run-tests-ml (3.10, ocr)	6m 57s
code-checks / build-package (3.10)	45s
code-checks / run-tests-ml (3.10, pdf-model)	11m 31s
code-checks / run-tests-ml (3.10, asr)	2m 35s
code-checks / run-tests-windows	0s
code-checks / test-pip-install-no-dev-headers	0s
code-checks / test-pip-install-no-lock	0s
code-checks / run-tests-macos	0s
code-checks / test-package (3.10)	36s
code-checks / check	7s
ci-status	3s
	50m 10s

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