[Transaction] Support produce batch transaction messages #8415
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Motivation
Currently, Pulsar only supports produce transaction messages in no batch mode.
Modifications
Add transaction id in the batch message container, if the newly added message has a different transaction id with the container, it will be added in the next batch.
Verifying this change
add a new unit test.
org.apache.pulsar.client.impl.TransactionEndToEndTest#batchProduceCommitTest
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yeswas chosen, please highlight the changes