message: [PlatformDarwin] Simplify logic and use FileSystem
  Simplify code path by using the FileSystem.
diff: @@ -190,25 +190,12 @@ FileSpecList PlatformDarwin::LocateExecutableScriptingResources(
  Status PlatformDarwin::ResolveSymbolFile(Target &target,
  const ModuleSpec &sym_spec,
  FileSpec &sym_file) {
  - Status error;
  sym_file = sym_spec.GetSymbolFileSpec();
  -
  - llvm::sys::fs::file_status st;
  - if (status(sym_file.GetPath(), st, false)) {
  - error.SetErrorString("Could not stat file!");
  - return error;
  - }
  -
  - if (exists(st)) {
  - if (is_directory(st)) {
  - sym_file = Symbols::FindSymbolFileInBundle(
  - sym_file, sym_spec.GetUUIDPtr(), sym_spec.GetArchitecturePtr());
  + if (FileSystem::Instance().IsDirectory(sym_file)) {
  + sym_file = Symbols::FindSymbolFileInBundle(sym_file, sym_spec.GetUUIDPtr(),
  + sym_spec.GetArchitecturePtr());
  }
  - } else {
  - if (sym_spec.GetUUID().IsValid()) {
  - }
  - }
  - return error;
  + return {};
  }
  static lldb_private::Status
  