[BUG] [CI] Tests under src/integrationTest folder not being executed in CI checks

[DarshitChanpura]

Tests in folder https://github.com/opensearch-project/security/tree/main/src/integrationTest are not being run as part of current CI, after #2861 merge.

Steps to reproduce the behavior:

1. As a first task in current CI run, ./gradlew listTasksAsJSON lists all test tasks to be executed
2. This is the current output:

["citest","ciSecurityIntegrationTest","crossClusterTest","dlicDlsflsTest","dlicRestApiTest","indicesTest","opensslCITest","sslTest"]

These tasks currently don't touch files in the mentioned folder. They can be executed with ./gradlew integrationTest

Take these two tests for example: CrossClusterSearchTests.java , WhoAmITests.java
Task citest by definition covers all tests not covered in other test tasks, but when I run these two with ./gradlew citest --tests "..." these are the outputs:

> No tests found for given includes: [**/*.class](include rules) [**/*$*.class](exclude rules) [org.opensearch.security.CrossClusterSearchTests](--tests filter)

> No tests found for given includes: [**/*.class](include rules) [**/*$*.class](exclude rules) [org.opensearch.security.rest.WhoAmITests](--tests filter)

What is the expected behavior?
All the tests in the mentioned folder should run. Adding these tests should also boost coverage.

Solution

1. Add integrationTest task as part of test tasks
   OR
2. Modify ciSecurityIntegrationTest task to also include these files.

[DarshitChanpura]

These are running as part of CI. No additional changes necessary.