swift

9d9b4c90 - [Sema] Sink Pattern invalidation into `SyntacticElementTarget::markInvalid`

[Sema] Sink Pattern invalidation into `SyntacticElementTarget::markInvalid` Rather than handling this in the callers of `typeCheckExpression`, handle it in the constraint system's invalidation logic. This also ensures we set a type for sub-pattern nodes.