fix bug in domain handling that permits when_all(a,b) when a and b have different completion domains#2018

ericniebler merged 4 commits intoNVIDIA:mainNVIDIA/stdexec:mainfrom

ericniebler:stream-and-default-domains-should-not-be-compatibleericniebler/stdexec:stream-and-default-domains-should-not-be-compatibleCopy head branch name to clipboard