Test

fix: change the tmpdir the checkpoint unpacks to #564

Job	Run time
check-flavor	8s
validate (upgrade, registry1) / run	1s
validate (install, unicorn) / run	8s
validate (install, registry1) / run	1s
validate (install, upstream) / run	1s
validate (upgrade, unicorn) / run	1s
validate (upgrade, upstream) / run	1s
	21s

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