metrics: add counters for checkAlreadyCommitted, split "InLedger" counters by reason #4881
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Summary
Following on #4839 this adds metrics for different errors returned by checkAlreadyCommitted, which calls TestTransactionGroup. It also adds information to the LeaseInLedger and TransactionInLedger errors to split separate counters for whether a txn/lease was already seen on-chain, or in the pending block evaluator.
Test Plan
Extended TestTxHandlerRememberReportErrorsWithTxPool to use the new counters.