[BUG] integTestRemote gradle task should produce a jacoco report

[cwperks]

What is the bug?

For the 2.18.0 release, the security repo added back in the custom scripts/integtest.sh (PR where added) file that triggers the integTestRemote task which runs a suite of integration tests against a target cluster. During the release, the target cluster is the release candidate build with all default plugins installed to ensure that all components integrate together seamlessly.

At the end of this test run, the task should generate jacoco reports that opensearch-build can upload to report on test failures and test coverage.