fix explain IT

Signed-off-by: xinyual <xinyual@amazon.com>

Author: xinyual

integ-test/src/test/resources/expectedOutput/ppl/explain_patterns_simple_pattern_agg_push.json

@@ -8,7 +8,7 @@
       {
         "name":"OpenSearchIndexScan",
         "description":{
-          "request":"OpenSearchQueryRequest(indexName=opensearch-sql_test_index_account, sourceBuilder={\"from\":0,\"size\":0,\"timeout\":\"1m\",\"aggregations\":{\"composite_buckets\":{\"composite\":{\"size\":1000,\"sources\":[{\"patterns_field\":{\"terms\":{\"script\":{\"source\":\"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\",\"lang\":\"opensearch_query_expression\"},\"missing_bucket\":true,\"missing_order\":\"first\",\"order\":\"asc\"}}}]},\"aggregations\":{\"pattern_count\":{\"value_count\":{\"field\":\"_index\"}},\"sample_logs\":{\"top_hits\":{\"from\":0,\"size\":10,\"version\":false,\"seq_no_primary_term\":false,\"explain\":false,\"_source\":{\"includes\":[\"email\"],\"excludes\":[]}}}}}}}, needClean=true, searchDone=false, pitId=null, cursorKeepAlive=null, searchAfter=null, searchResponse=null)"},
+          "request":"OpenSearchQueryRequest(indexName=opensearch-sql_test_index_account, sourceBuilder={\"from\":0,\"size\":0,\"timeout\":\"1m\",\"aggregations\":{\"composite_buckets\":{\"composite\":{\"size\":1000,\"sources\":[{\"patterns_field\":{\"terms\":{\"script\":{\"source\":\"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\",\"lang\":\"opensearch_query_expression\"},\"missing_bucket\":true,\"missing_order\":\"first\",\"order\":\"asc\"}}}]},\"aggregations\":{\"pattern_count\":{\"value_count\":{\"field\":\"_index\"}},\"sample_logs\":{\"top_hits\":{\"from\":0,\"size\":10,\"version\":false,\"seq_no_primary_term\":false,\"explain\":false,\"_source\":{\"includes\":[\"email\"],\"excludes\":[]}}}}}}}, needClean=true, searchDone=false, pitId=null, cursorKeepAlive=null, searchAfter=null, searchResponse=null)"},
         "children":[]
       }
     ]