Reorganize hooks tests to coding standards and consistency #1019

Job	Run time
Core running from build / Core running from build / MacOS	5m 2s
Core running from src / Core running from src / MacOS	3m 5s
Core running from build / Core running from build / Linux	2m 0s
Core running from src / Core running from src / Linux	1m 57s
Core running from build / Core running from build / Windows	3m 49s
Core running from src / Core running from src / Windows	4m 38s
Gutenberg running from build / Gutenberg running from build / Linux	8m 11s
Gutenberg running from src / Gutenberg running from src / Linux	8m 33s
Gutenberg running from build / Gutenberg running from build / Windows	11m 42s
Gutenberg running from src / Gutenberg running from src / Windows	11m 38s
Gutenberg running from build / Gutenberg running from build / MacOS	11m 0s
Gutenberg running from src / Gutenberg running from src / MacOS	12m 55s
Leave WordPress Playground details	2s
Slack Notifications	0s
Failed workflow tasks	0s
	1h 24m 32s

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