[hotfix] Use simplifiedCondition to check for isAlwaysTrue in PushCalcPastChangelogNormalizeRule

Author: snuyanzin

flink-table/flink-table-planner/src/main/java/org/apache/flink/table/planner/plan/rules/physical/stream/PushCalcPastChangelogNormalizeRule.java

@@ -328,7 +328,7 @@ private void transformWithRemainingPredicates(
             final RexNode condition = relBuilder.and(conditions);
             final RexNode simplifiedCondition =
                     FlinkRexUtil.simplify(relBuilder.getRexBuilder(), condition, rexExecutor);
-            if (!condition.isAlwaysTrue()) {
+            if (!simplifiedCondition.isAlwaysTrue()) {
                 programBuilder.addCondition(adjustInputRef(simplifiedCondition, inputRefMapping));
             }
         }