[CI] Test circleci splitting

[cristianfr]

Summary

Test splittting with circle CI

Why / Goal

Scala 11 tests take 4x the other tests. When they fail they need to be restarted.

By splitting it allows to only retry the failed tests.

Test Plan

• [ ] Added Unit Tests
• [x] Covered by existing CI
• [ ] Integration tested

Checklist

• [ ] Documentation update

Reviewers