Add logic to sort posts by hierarchy #12919

Job	Run time
Core running from build / Core running from build / Linux	2m 16s
Core running from src / Core running from src / Linux	2m 8s
Core running from build / Core running from build / Windows	3m 23s
Core running from src / Core running from src / Windows	3m 34s
Core running from build / Core running from build / MacOS	1m 51s
Core running from src / Core running from src / MacOS	1m 53s
Gutenberg running from build / Gutenberg running from build / Linux	8m 42s
Gutenberg running from src / Gutenberg running from src / Linux	8m 29s
Gutenberg running from build / Gutenberg running from build / Windows	11m 26s
Gutenberg running from src / Gutenberg running from src / Windows	11m 2s
Gutenberg running from build / Gutenberg running from build / MacOS	7m 28s
Gutenberg running from src / Gutenberg running from src / MacOS	9m 14s
Slack Notifications	0s
Failed workflow tasks	0s
	1h 11m 26s

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