feat: Adding M1/Intel runners to `run-tests.yml` and introducing fast-mode

[abanuelo]

Description

This PR introduces the following changes:

• Adding M1 runners to the matrix
• Adding Intel-based mac-os runners to the matrix
• Running most tests in fast mode
• Running only latest version of python across all os's in the full suite

Issue Link

Checklist

• [X] I have tested the changes locally via pytest and/or other means
• [ ] I have added or updated relevant documentation
• [ ] I have autoformatted the code with black and isort
• [ ] I have added test cases (if applicable)

Additional Notes

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

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Additional details and impacted files

[](https://app.codecov.io/gh/BerkeleyLearnVerify/Scenic/pull/265?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=BerkeleyLearnVerify) ```diff @@ Coverage Diff @@ ## main #265 +/- ## ======================================= Coverage ? 91.09% ======================================= Files ? 54 Lines ? 13505 Branches ? 0 ======================================= Hits ? 12303 Misses ? 1202 Partials ? 0 ```