ci: Use `nextest` #9240

Job	Run time
@turbo/repository (ubuntu, Node 20)	1m 33s
@turbo/repository (macos, Node 22)	1m 31s
@turbo/repository (macos, Node 20)	2m 1s
@turbo/repository (macos, Node 18)	2m 19s
@turbo/repository (ubuntu, Node 22)	2m 50s
@turbo/repository (ubuntu, Node 18)	1m 34s
	11m 48s

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