EQL: Add result_position to correctness test (#66761)

Author: costin

x-pack/plugin/eql/qa/correctness/src/javaRestTest/java/org/elasticsearch/xpack/eql/EsEQLCorrectnessIT.java

@@ -150,6 +150,7 @@ public void test() throws Exception {
         eqlSearchRequest.tiebreakerField("serial_id");
         eqlSearchRequest.size(Integer.parseInt(CFG.getProperty("size")));
         eqlSearchRequest.fetchSize(Integer.parseInt(CFG.getProperty("fetch_size")));
+        eqlSearchRequest.resultPosition(CFG.getProperty("result_position"));
         EqlSearchResponse response = highLevelClient().eql().search(eqlSearchRequest, RequestOptions.DEFAULT);
         long responseTime = response.took();
         LOGGER.info("QueryNo: {}, took: {}ms", queryNo, responseTime);

x-pack/plugin/eql/qa/correctness/src/javaRestTest/resources/config.properties

@@ -8,6 +8,7 @@ index_name=mitre
 index_doc_count=3950632
 fetch_size=1000
 size=2000
+result_position=tail
 gcs_repo_name=eql_correctness_gcs_repo
 gcs_snapshot_name=correctness-snapshot_es7.10_lucene8.7.0
 gcs_bucket_name=eql-gcs