Backport "fix: Allow `as` as an infix type in non context bound types" to 3.6.2#21901

WojciechMazur merged 2 commits intorelease-3.6.2scala/scala3:release-3.6.2from

release-3.6.2-backport-21849scala/scala3:release-3.6.2-backport-21849Copy head branch name to clipboard