[v23.1.x] tm_stm: add tx to cache on create #14802
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A test using transaction would randomly fail with `INVALID_PRODUCER_ID_MAPPING` if the transaction coordinator leader would change between the producer issued `InitProducerId` and `AddPartitionsToTxn`. Since [Fixes Unknown Server Errors (USE) in transactions][1], this should not happen as we cache transaction state and fetch it from all nodes. However, it appears we forgot to cache the state after the `InitProducerId` request. This PR fixes that and updates a test that catches the problem and validates the fix. Fixes redpanda-data#13736 [1]: redpanda-data#7591 (cherry picked from commit 6bcb0b0)
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mmaslankaprv
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Nov 8, 2023
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Backport of PR #14784
Fixes: #14800,