message: Make idl_parser deterministic
  * Make idl_parser deterministic
  Some golden tests even exercise this [logic](https://github.com/google/flatbuffers/blob/df2df21ec1be2468106fed10c1533eacc1cf0d2e/tests/prototest/test.golden#L8). Let's make the parser fully stable not depending on the implementation of std::sort
  * Retry the ci
diff: @@ -2152,10 +2152,16 @@ void EnumDef::SortByValue() {
  auto &v = vals.vec;
  if (IsUInt64())
  std::sort(v.begin(), v.end(), [](const EnumVal *e1, const EnumVal *e2) {
  + if (e1->GetAsUInt64() == e2->GetAsUInt64()) {
  + return e1->name < e2->name;
  + }
  return e1->GetAsUInt64() < e2->GetAsUInt64();
  });
  else
  std::sort(v.begin(), v.end(), [](const EnumVal *e1, const EnumVal *e2) {
  + if (e1->GetAsInt64() == e2->GetAsInt64()) {
  + return e1->name < e2->name;
  + }
  return e1->GetAsInt64() < e2->GetAsInt64();
  });
  }
  