Added accessibility support for hierarchial post type #28784

Job	Run time
Core running from src / Linux	2m 13s
Core running from build / MacOS	2m 17s
Core running from src / Windows	3m 42s
Core running from build / Linux	2m 30s
Core running from src / MacOS	2m 33s
Core running from build / Windows	3m 25s
Slack Notifications	0s
Failed workflow tasks	0s
	16m 40s

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