Fix invalid BulkRequest construction for indexRandom()

[reta]

Description

Fix invalid BulkRequest construction for indexRandom():

org.opensearch.action.ActionRequestValidationException: Validation Failed: 1: RefreshPolicy is not supported on an item request. Set it on the BulkRequest instead.;2: RefreshPolicy is not supported on an item request. Set it on the BulkRequest instead.;3: RefreshPolicy is not supported on an item request. Set it on the BulkRequest instead.;4: RefreshPolicy is not supported on an item request. Set it on the BulkRequest instead.;
	at __randomizedtesting.SeedInfo.seed([19EE5058CA5DFA10:CEAC4ADCAF30EA37]:0)
	at app//org.opensearch.action.ValidateActions.addValidationError(ValidateActions.java:44)
	at app//org.opensearch.action.bulk.BulkRequest.validate(BulkRequest.java:432)
	at app//org.opensearch.action.support.TransportAction.execute(TransportAction.java:177)
	at app//org.opensearch.action.support.TransportAction.execute(TransportAction.java:107)
	at app//org.opensearch.client.node.NodeClient.executeLocally(NodeClient.java:110)
	at app//org.opensearch.client.node.NodeClient.doExecute(NodeClient.java:97)
	at app//org.opensearch.client.support.AbstractClient.execute(AbstractClient.java:476)
	at app//org.opensearch.client.FilterClient.doExecute(FilterClient.java:83)
	at app//org.opensearch.client.support.AbstractClient.execute(AbstractClient.java:476)
	at app//org.opensearch.client.support.AbstractClient.execute(AbstractClient.java:463)
	at app//org.opensearch.action.ActionRequestBuilder.execute(ActionRequestBuilder.java:66)
	at app//org.opensearch.test.OpenSearchIntegTestCase.indexRandom(OpenSearchIntegTestCase.java:1651)
	at app//org.opensearch.test.OpenSearchIntegTestCase.indexRandom(OpenSearchIntegTestCase.java:1582)
	at app//org.opensearch.test.OpenSearchIntegTestCase.indexRandom(OpenSearchIntegTestCase.java:1566)
	at app//org.opensearch.search.suggest.CompletionSuggestSearchIT.testSkipDuplicates(CompletionSuggestSearchIT.java:1199)

Related Issues

See please:

• https://build.ci.opensearch.org/job/gradle-check/30587/testReport/junit/org.opensearch.search.suggest/CompletionSuggestSearchIT/testSkipDuplicates__p0___search_concurrent_segment_search_enabled___true___/

Check List

• New functionality includes testing.
  • All tests pass
• New functionality has been documented.
  • New functionality has javadoc added
• Failing checks are inspected and point to the corresponding known issue(s) (See: Troubleshooting Failing Builds)
• Commits are signed per the DCO using --signoff
• Commit changes are listed out in CHANGELOG.md file (See: Changelog)
• Public documentation issue/PR created

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.
For more information on following Developer Certificate of Origin and signing off your commits, please check here.

[github-actions]

Compatibility status:

Checks if related components are compatible with change 270a329

Incompatible components

Skipped components

Compatible components

Compatible components: [https://github.com/opensearch-project/security-analytics.git, https://github.com/opensearch-project/asynchronous-search.git, https://github.com/opensearch-project/observability.git, https://github.com/opensearch-project/job-scheduler.git, https://github.com/opensearch-project/reporting.git, https://github.com/opensearch-project/notifications.git, https://github.com/opensearch-project/opensearch-oci-object-storage.git, https://github.com/opensearch-project/custom-codecs.git, https://github.com/opensearch-project/neural-search.git, https://github.com/opensearch-project/common-utils.git, https://github.com/opensearch-project/index-management.git, https://github.com/opensearch-project/geospatial.git, https://github.com/opensearch-project/ml-commons.git, https://github.com/opensearch-project/anomaly-detection.git, https://github.com/opensearch-project/security.git, https://github.com/opensearch-project/sql.git, https://github.com/opensearch-project/k-nn.git, https://github.com/opensearch-project/cross-cluster-replication.git, https://github.com/opensearch-project/alerting.git, https://github.com/opensearch-project/performance-analyzer-rca.git, https://github.com/opensearch-project/performance-analyzer.git]

[github-actions]

✅ Gradle check result for 270a329: SUCCESS

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (4ad2d4c) 71.40% compared to head (270a329) 71.29%.

Additional details and impacted files

@@             Coverage Diff              @@
##               main   #11516      +/-   ##
============================================
- Coverage     71.40%   71.29%   -0.11%     
- Complexity    59146    59151       +5     
============================================
  Files          4904     4904              
  Lines        278149   278149              
  Branches      40419    40419              
============================================
- Hits         198599   198320     -279     
- Misses        63020    63346     +326     
+ Partials      16530    16483      -47     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.