Preparing a docs on how to improve macOS queue time and TTS

[huydhn]

WIP https://docs.google.com/document/d/1d2gvsN8Nvmt0P1vtAJD-VetI4pgpJB-ljPijV4nS82E/edit?tab=t.0

[huydhn]

https://docs.google.com/document/d/1d2gvsN8Nvmt0P1vtAJD-VetI4pgpJB-ljPijV4nS82E/edit?tab=t.0

[georgehong]

Next steps: goal, problems,...etc enumerated. Moving forward: narrow priority call. Is there a place forward for reducing the workload to balance with the queueing based on the amount of signal obtained from these jobs.

Data seems to indicate number of job throughput is causing the queueing as well, so test volume might not be sufficient.

[huydhn]

The doc has been updated accordingly starting with the overall goal to land PR in less than 3 hours, all the problems we need to solve to achieve that, and finally their recommended solutions.