Add Playwright e2e test for bulk delete of pages #12508

Job	Run time
Core running from build / Core running from build / Linux	2m 17s
Core running from src / Core running from src / Linux	1m 57s
Core running from build / Core running from build / Windows	4m 8s
Core running from src / Core running from src / Windows	3m 52s
Core running from build / Core running from build / MacOS	1m 46s
Core running from src / Core running from src / MacOS	2m 4s
Gutenberg running from build / Gutenberg running from build / Linux	8m 52s
Gutenberg running from src / Gutenberg running from src / Linux	9m 2s
Gutenberg running from build / Gutenberg running from build / Windows	4m 24s
Gutenberg running from src / Gutenberg running from src / Windows	3m 26s
Gutenberg running from src / Gutenberg running from src / MacOS	7m 5s
Gutenberg running from build / Gutenberg running from build / MacOS	12m 4s
Slack Notifications	0s
Failed workflow tasks	0s
	1h 0m 57s

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