message: add postgres string split alias
diff: @@ -280,7 +280,7 @@ void StringSplitFun::RegisterFunction(BuiltinFunctions &set) {
  child_types.push_back(std::make_pair("string", LogicalType::VARCHAR));
  auto varchar_list_type = LogicalType(LogicalTypeId::LIST, child_types);
  - set.AddFunction({"string_split", "str_split"}, ScalarFunction({LogicalType::VARCHAR, LogicalType::VARCHAR},
  + set.AddFunction({"string_split", "str_split", "string_to_array"}, ScalarFunction({LogicalType::VARCHAR, LogicalType::VARCHAR},
  varchar_list_type, string_split_function));
  set.AddFunction(
  {"string_split_regex", "str_split_regex"},
  