Fix IllegalStateException for Transaction Producer

[k-raina]

Current Behavior:

• When a batch fails with a fatal error (e.g., ProducerFencedException), the TM transitions to FATAL state
• However, subsequent batches that fail can still trigger state transitions through code path Sender.failBatch -> TM.handleFailedBatch > TM.maybeTransitionToErrorState
• This means that even after entering FATAL state, other batches could potentially transition the TM to ABORTABLE state

Example Scenario:

Batch 1 fails with ProducerFencedException
  ↓
TM transitions to FATAL state
  ↓
Batch 2 fails with UnknownProducerIdException
  ↓
TM incorrectly transitions to ABORTABLE state (this is the bug)

[github-actions]

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