test(integ-test): add verifyDataRows to dashboard patterns IT

Per @dai-chen: schema-only verification doesn't catch "query succeeds but
returns 0/wrong rows". Pin the 4 BRAIN clusters with their exact patterns,
counts, and sample logs against the HDFS_LOGS fixture.

Signed-off-by: Kai Huang <ahkcs@amazon.com>

Author: ahkcs

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

@@ -6,9 +6,12 @@
 package org.opensearch.sql.calcite.remote;
 
 import static org.opensearch.sql.legacy.TestsConstants.TEST_INDEX_HDFS_LOGS;
+import static org.opensearch.sql.util.MatcherUtils.rows;
 import static org.opensearch.sql.util.MatcherUtils.schema;
+import static org.opensearch.sql.util.MatcherUtils.verifyDataRows;
 import static org.opensearch.sql.util.MatcherUtils.verifySchemaInOrder;
 
+import com.google.common.collect.ImmutableList;
 import java.io.IOException;
 import org.json.JSONObject;
 import org.junit.Test;
@@ -42,5 +45,30 @@ public void testDashboardBrainLabelStatsByPatternsField() throws IOException {
         schema("patterns_field", "string"),
         schema("pattern_count", "bigint"),
         schema("sample_logs", "array"));
+    verifyDataRows(
+        result,
+        rows(
+            "BLOCK* NameSystem.addStoredBlock: blockMap updated: <*IP*> is added to blk_<*> size"
+                + " <*>",
+            2,
+            ImmutableList.of(
+                "BLOCK* NameSystem.addStoredBlock: blockMap updated: 10.251.31.85:50010 is added"
+                    + " to blk_-7017553867379051457 size 67108864")),
+        rows(
+            "PacketResponder failed <*> blk_<*>",
+            2,
+            ImmutableList.of("PacketResponder failed for blk_6996194389878584395")),
+        rows(
+            "Verification succeeded <*> blk_<*>",
+            2,
+            ImmutableList.of("Verification succeeded for blk_-1547954353065580372")),
+        rows(
+            "<*> NameSystem.allocateBlock:"
+                + " /user/root/sortrand/_temporary/_task_<*>_<*>_r_<*>_<*>/part<*> blk_<*>",
+            2,
+            ImmutableList.of(
+                "BLOCK* NameSystem.allocateBlock:"
+                    + " /user/root/sortrand/_temporary/_task_200811092030_0002_r_000296_0/part-00296."
+                    + " blk_-6620182933895093708")));
   }
 }