KSES: Add test cases for "bogus comment" syntax not currently detected. #6654

Job	Run time
Core running from build / Core running from build / Linux	1m 57s
Core running from src / Core running from src / Linux	1m 48s
Core running from build / Core running from build / Windows	3m 35s
Core running from src / Core running from src / Windows	3m 42s
Core running from build / Core running from build / MacOS	1m 44s
Core running from src / Core running from src / MacOS	1m 40s
Gutenberg running from build / Gutenberg running from build / Linux	7m 50s
Gutenberg running from src / Gutenberg running from src / Linux	8m 11s
Gutenberg running from build / Gutenberg running from build / Windows	10m 45s
Gutenberg running from src / Gutenberg running from src / Windows	10m 52s
Gutenberg running from build / Gutenberg running from build / MacOS	8m 55s
Gutenberg running from src / Gutenberg running from src / MacOS	18m 35s
Slack Notifications	0s
Failed workflow tasks	0s
	1h 19m 34s

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