[BUG] Build publishing broken due to duplicate artifacts

[dbwiddis]

What is the bug?

Since merging #687, snapshot publication is broken:

FAILURE: Build failed with an exception.

* What went wrong:
Task 'publishMavenJavaPublicationToSnapshotsRepository' not found in root project 'opensearch-sdk-java'.

Also, possibly related, unable to publish to mavenLocal().

> Task :publishNebulaPublicationToMavenLocal FAILED

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':publishNebulaPublicationToMavenLocal'.
> Failed to publish publication 'nebula' to repository 'mavenLocal'
   > Invalid publication 'nebula': multiple artifacts with the identical extension and classifier ('jar', 'sources').

Reverting the associated commit 04d9eab allows publishing.

How can one reproduce the bug?

./gradlew publishToMavenLocal

What is the expected behavior?

BUILD SUCCESSFUL in 8s
9 actionable tasks: 9 executed

Do you have any additional context?

This PR also broke gradle run, see #789 (this was known before merge, but the additional failures were not)

[owaiskazi19]

Raised #799 to revert the change. Meanwhile, @ryanbogan can address the above issue and push new change for integ test framework.