fix no pushdown IT

Signed-off-by: Lantao Jin <ltjin@amazon.com>

Author: LantaoJin

integ-test/src/test/java/org/opensearch/sql/ppl/RareCommandIT.java

@@ -59,7 +59,7 @@ public void testRareWithGroup() throws IOException {
           rows("F", "OK", 7),
           rows("F", "KS", 7),
           rows("F", "CO", 7),
-          rows("F", "AR", 8),
+          isPushdownEnabled() ? rows("F", "AR", 8) : rows("F", "NV", 8),
           rows("M", "NE", 5),
           rows("M", "RI", 5),
           rows("M", "NV", 5),