[BUG] Integration tests with unreleased versions is failing #904
Description
What is the bug?
Integration tests with unreleased versions is blocked on main branch due to Java version incompatibility:
* What went wrong:
A problem occurred evaluating project ':buildSrc'.
> At least Java 21 is required to build opensearch gradle tools
How can one reproduce the bug?
See this workflow https://github.com/opensearch-project/opensearch-py/actions/runs/13513124325/job/37810628691
What is the expected behavior?
Integration tests with unreleased versions should be passing.
What is your host/environment?
Operating system, version.
Do you have any screenshots?
If applicable, add screenshots to help explain your problem.
Do you have any additional context?
Add any other context about the problem.