Investigate running TestClientTestSuite E2Es in parallel

[chatton]

Summary

Currently, the client test suite E2Es cannot be run in parallel due to the nature of some of the tests (as they modify chain wide params etc )

They will need to be looked at on a case by case basis to see which ones are safe to run in parallel.

For the ones that are not safe to run, we can make a new test suite for each one.

---

For Admin Use

• Not duplicate issue
• Appropriate labels applied
• Appropriate contributors tagged/assigned