[cherry-pick stable/20230725] [lldb] Fix failures when evaluating C++ expression and loading modules

rdar://105819340

Author: git apple-llvm automerger

lldb/source/Plugins/ExpressionParser/Clang/ClangExpressionParser.cpp

@@ -576,6 +576,7 @@ ClangExpressionParser::ClangExpressionParser(
     lang_opts.GNUMode = true;
     lang_opts.GNUKeywords = true;
     lang_opts.CPlusPlus11 = true;
+    lang_opts.BuiltinHeadersInSystemModules = true;
 
     // The Darwin libc expects this macro to be set.
     lang_opts.GNUCVersion = 40201;