Increase parallelism for RSpec jobs
What does this MR do and why?
Increase parallelism for RSpec jobs
Reference merge request: https://gitlab.com/gitlab-org/gitlab/-/pipelines/1118782302
- Unit tests jobs often took 50 minutes+ to run.
- EE unit tests jobs probably took slightly less but still a lot like 45 minutes+
Latest pipeline trace with the changes: https://gitlab.com/gitlab-org/gitlab/-/tracing/acbea9c4-d6ac-3824-59af-a2306f20b929
Related to #436569 (closed)
Edited by Lin Jen-Shin