change error log to warn log (#12204)

Co-authored-by: Prashant Yadav <[email protected]>

core/services/pg/transaction.go

@@ -78,7 +78,7 @@ func sqlxTransactionQ(ctx context.Context, db txBeginner, lggr logger.Logger, fn
 				panic(fmt.Sprintf("panic in transaction; aborting rollback that took longer than 10s: %s", p))
 			}
 		} else if err != nil {
-			lggr.Errorf("Error in transaction, rolling back: %s", err)
+			lggr.Warnf("Error in transaction, rolling back: %s", err)
 			// An error occurred, rollback and return error
 			if rerr := tx.Rollback(); rerr != nil {
 				err = multierr.Combine(err, errors.WithStack(rerr))