test: improve stability of Playwright tests #16199

Job	Run time
Lint	2m 31s
Test with Node 18 (1, 4)	2m 32s
Test with Node 18 (2, 4)	1m 50s
Test with Node 18 (3, 4)	2m 15s
Test with Node 18 (4, 4)	1m 30s
Test with Node 20 (1, 4)	2m 17s
Test with Node 20 (2, 4)	1m 52s
Test with Node 20 (3, 4)	2m 11s
Test with Node 20 (4, 4)	1m 23s
Get global coverage thresholds	5s
Check global coverage with Node 18	37s
Check global coverage with Node 20	33s
	19m 36s

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