test: migrate yarn modern examples to corepack #2747

Job	Run time
ping-cli	7s
wait	36s
wait2	48s
wait2-delay-120	2m 13s
wait2-delay-50	1m 28s
wait3-for-200-seconds	4m 15s
wait3	1m 15s
wait4	38s
wait-multiple	1m 59s
wait-on-nextjs	39s
wait-server-starts-after-100-seconds	1m 54s
wait-on-vite	30s
wait-using-custom-command	26s
	16m 48s

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