Take special handling for chart with use other explain IT

Signed-off-by: Yuanchun Shen <yuanchu@amazon.com>

Author: yuancu

integ-test/src/test/java/org/opensearch/sql/calcite/remote/CalciteExplainIT.java

@@ -1483,14 +1483,20 @@ public void testExplainChartWithLimits() throws IOException {
         explainQueryYaml(
             String.format(
                 "source=%s | chart limit=0 avg(balance) over state by gender", TEST_INDEX_BANK)));
+  }
 
-    assertYamlEqualsIgnoreId(
-        loadExpectedPlan("chart_use_other.yaml"),
-        explainQueryYaml(
-            String.format(
-                "source=%s | chart limit=2 useother=true otherstr='max_among_other'"
-                    + " max(severityNumber) over flags by severityText",
-                TEST_INDEX_OTEL_LOGS)));
+  @Test
+  public void testExplainChartWithUseOther() throws IOException {
+      // In the non-pushdown version, there's a slightly different physical plan due to position difference
+      enabledOnlyWhenPushdownIsEnabled();
+      // Mask all numbers because the location in the backport is different
+      assertYamlEqualsIgnoreId(
+              loadExpectedPlan("chart_use_other.yaml").replaceAll("\\d+", "*").replaceAll("(severityText|flags|severityNumber)", ""),
+              explainQueryYaml(
+                      String.format(
+                              "source=%s | chart limit=2 useother=true otherstr='max_among_other'"
+                                      + " max(severityNumber) over flags by severityText",
+                              TEST_INDEX_OTEL_LOGS)).replaceAll("\\d+", "*").replaceAll("(severityText|flags|severityNumber)", ""));
   }
 
   @Test