[CSFix] Skip constrained erasure check (SE-0352) for sequence expressions
[CSFix] Skip constrained erasure check (SE-0352) for sequence expressions

Just like `any Collection`, it should be possible to use `any Sequence`
to iterate over.

roambotics/swift,benlangmuir/swift,JGiola/swift,glessard/swift,benlangmuir/swift,apple/swift,roambotics/swift,JGiola/swift,benlangmuir/swift,roambotics/swift,benlangmuir/swift,glessard/swift,apple/swift,apple/swift,JGiola/swift,benlangmuir/swift,JGiola/swift,roambotics/swift,roambotics/swift,glessard/swift,benlangmuir/swift,apple/swift,glessard/swift,glessard/swift,apple/swift,apple/swift,roambotics/swift,JGiola/swift,JGiola/swift,glessard/swift