accounts/abi/bind: improve WaitMined error handling (#24321)

This change makes it so WaitMined no longer logs an error when the receipt
is unavailable. It also changes the simulated backend to return NotFound for
unavailable receipts, just like ethclient does.

accounts/abi/bind/backends/simulated.go

@@ -230,6 +230,9 @@ func (b *SimulatedBackend) TransactionReceipt(ctx context.Context, txHash common
 	defer b.mu.Unlock()
 
 	receipt, _, _, _ := rawdb.ReadReceipt(b.database, txHash, b.config)
+	if receipt == nil {
+		return nil, ethereum.NotFound
+	}
 	return receipt, nil
 }