Add unit tests for wp_refresh_post_lock() in wp-admin/includes/misc.php #29899

Job	Run time
Core running from src / MacOS	2m 33s
Core running from build / MacOS	3m 19s
Core running from src / Linux	2m 16s
Core running from build / Windows	4m 23s
Core running from src / Windows	3m 51s
Core running from build / Linux	2m 24s
Slack Notifications	0s
Failed workflow tasks	0s
	18m 46s

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