Performance CI Load testing

[Sonicadvance1]

We need CI performance benchmarking.

https://github.com/marketplace/actions/continuous-benchmark
https://k6.io/blog/load-testing-using-github-actions
https://docs.gitlab.com/ee/user/project/merge_requests/load_performance_testing.html

[Sonicadvance1]

We should put do some sort of fmod+unity loadCI testing. it does a pathological amount of scalar operations that seem to hit us fairly hard.
Noticed by Hollow Knight's audio playback not even able to maintain realtime with x86 host.