swift

bbc48168 - [sema] Move getConcurrencyDiagnosticBehaviorLimit and hasExplicitSendableConformance out of Sema and into libAST.

[sema] Move getConcurrencyDiagnosticBehaviorLimit and hasExplicitSendableConformance out of Sema and into libAST. I am going to expose this on TypeBase, so I am attempting to prevent a layering violation in between AST and Sema.