add IT for calcite no pushdown

Signed-off-by: Jialiang Liang <jiallian@amazon.com>

Author: RyanL1997

integ-test/src/test/java/org/opensearch/sql/calcite/CalciteNoPushdownIT.java

@@ -82,6 +82,7 @@
   CalcitePrometheusDataSourceCommandsIT.class,
   CalciteQueryAnalysisIT.class,
   CalciteRareCommandIT.class,
+  CalciteRegexCommandIT.class,
   CalciteRenameCommandIT.class,
   CalciteResourceMonitorIT.class,
   CalciteSearchCommandIT.class,

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

@@ -0,0 +1,16 @@
+/*
+ * Copyright OpenSearch Contributors
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+package org.opensearch.sql.calcite.remote;
+
+import org.opensearch.sql.ppl.RegexCommandIT;
+
+public class CalciteRegexCommandIT extends RegexCommandIT {
+  @Override
+  public void init() throws Exception {
+    super.init();
+    enableCalcite();
+  }
+}