Revert "Revert "[cxx-interop][SwiftCompilerSources] Use C++ enums directly from Swift""

This reverts commit 69431f00

include/swift/module.modulemap

@@ -7,10 +7,17 @@ module BasicBridging {
 }
 
 module ASTBridging {
+  header "AST/AnyFunctionRef.h"
   header "AST/ASTBridging.h"
+  header "AST/Builtins.h"
   header "AST/DiagnosticEngine.h"
   header "AST/DiagnosticConsumer.h"
+  header "AST/ForeignAsyncConvention.h"
+  header "AST/ForeignErrorConvention.h"
   header "AST/SubstitutionMap.h"
+
+  textual header "AST/Builtins.def"
+
   requires cplusplus
   export *
 }