[semantic-arc] Add the assume-parsing-unqualified-ownership-sil argument ath forces the Parser to assume that all parsed code is unqualified. This overrides the parser ownership heuristic.

include/swift/AST/SILOptions.h

@@ -116,6 +116,9 @@ public:
 
   /// If set to true, compile with the SIL Ownership Model enabled.
   bool EnableSILOwnership = false;
+
+  /// When parsing SIL, assume unqualified ownership.
+  bool AssumeUnqualifiedOwnershipWhenParsing = false;
 };
 
 } // end namespace swift