[Swift] lldb: Adjust calls to clang::DiagnosticsEngine ctor (now takes ref vs. ptr)

See llvm#106271

(cherry picked from commit 78fe2cf)

Author: AnthonyLatsis

lldb/source/Plugins/TypeSystem/Swift/SwiftASTContext.cpp

@@ -1883,10 +1883,10 @@ void SwiftASTContext::AddExtraClangCC1Args(
 
   std::string diags;
   llvm::raw_string_ostream os(diags);
-  auto diagOpts = llvm::makeIntrusiveRefCnt<clang::DiagnosticOptions>();
+  clang::DiagnosticOptions diagOpts;
   clang::DiagnosticsEngine clangDiags(
       new clang::DiagnosticIDs(), diagOpts,
-      new clang::TextDiagnosticPrinter(os, diagOpts.get()));
+      new clang::TextDiagnosticPrinter(os, diagOpts));
 
   if (!clang::CompilerInvocation::CreateFromArgs(invocation, clangArgs,
                                                  clangDiags)) {