What is the purpose of the change

optimize BatchMessage detection in DefaultMQProducer::sendKernelImpl, and fix bug in CProducer.

Brief changelog

replace:

      BatchMessage batchMessage;
      bool isBatchMsg = (typeid(msg).name() == typeid(batchMessage).name());

with:

      bool isBatchMsg = std::type_index(typeid(msg)) == std::type_index(typeid(BatchMessage));

Verifying this change

XXXX

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