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This will use all available cores to run tests, and parallelize by all - suite/class/method. On machines with multiple cores, this will vastly improve test performance. These times are on my M1 MBP with 10 (8P + 2E) cores. They were reported by maven on running mvn verify.

I first ran mvn verify and ignored the time.
Then I ran it thrice without this change, and thrice with this change.

All times in seconds.

Run 1 Run 2 Run 3 Average
Before 53 52 53 53
After 47 47 47 47
Savings 6
% 11

Testing done

All existing tests pass

### Submitter checklist
- [x] Make sure you are opening from a **topic/feature/bugfix branch** (right side) and not your main branch!
- [x] Ensure that the pull request title represents the desired changelog entry
- [x] Please describe what you did
- [ ] Link to relevant issues in GitHub or Jira
- [ ] Link to relevant pull requests, esp. upstream and downstream changes
- [ ] Ensure you have provided tests - that demonstrates feature works or fixes the issue

This will use all available cores to run tests, and parallelize by all - suite/class/method.
On machines with multiple cores, this will vastly improve test performance.
These times are on my M1 MBP with 10 (8P + 2E) cores. They were reported by maven on running `mvn verify`.

I first ran `mvn verify` and ignored the time.
Then I ran it thrice without this change, and thrice with this change.

All times in seconds.

|        | Run 1 | Run 2 | Run 3 | Average |
| ------ | ----: | ----: | ----: | ------: |
| Before |    53 |    52 |    53 |      53 |
| After  |    47 |    47 |    47 |      47 |
| Savings|       |       |       |       6 |
| %      |       |       |       |      11 |
@rahulsom rahulsom requested a review from a team as a code owner July 16, 2023 20:02
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