test: migrate yarn modern examples to corepack (#1350) #2748

Job	Run time
wait	20s
ping-cli	6s
wait2	51s
wait2-delay-120	2m 19s
wait2-delay-50	1m 23s
wait3	1m 27s
wait3-for-200-seconds	4m 19s
wait4	31s
wait-multiple	1m 50s
wait-on-nextjs	25s
wait-on-vite	14s
wait-server-starts-after-100-seconds	2m 2s
wait-using-custom-command	31s
	16m 18s

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