[Backport 2.x] [Search Pipeline]Handled default search pipeline for multiple indices

[opensearch-trigger-bot]

Backport defbd60 from #13276.

[github-actions]

❌ Gradle check result for 67c6087: FAILURE

Please examine the workflow log, locate, and copy-paste the failure(s) below, then iterate to green. Is the failure a flaky test unrelated to your change?

[VachaShah]

❌ Gradle check result for 67c6087: FAILURE

Please examine the workflow log, locate, and copy-paste the failure(s) below, then iterate to green. Is the failure a flaky test unrelated to your change?

Test Result (2 failures / +2)
org.opensearch.backwards.MixedClusterClientYamlTestSuiteIT.test {p0=indices.get_field_mapping/20_missing_field/Return empty object if field doesn't exist, but index does}
org.opensearch.indices.IndicesRequestCacheIT.testInvalidStalenessThresholdUpdateThrowsException {p0={"opensearch.experimental.feature.pluggable.caching.enabled":"true"}}

[github-actions]

❌ Gradle check result for 67c6087: null

Please examine the workflow log, locate, and copy-paste the failure(s) below, then iterate to green. Is the failure a flaky test unrelated to your change?

[github-actions]

❌ Gradle check result for 67c6087: FAILURE

Please examine the workflow log, locate, and copy-paste the failure(s) below, then iterate to green. Is the failure a flaky test unrelated to your change?

[github-actions]

❕ Gradle check result for 67c6087: UNSTABLE

• TEST FAILURES:

      1 org.opensearch.cluster.MinimumClusterManagerNodesIT.testThreeNodesNoClusterManagerBlock

Please review all flaky tests that succeeded after retry and create an issue if one does not already exist to track the flaky failure.