Add M1 GitHub runner and update scheduled tests

[BradyPlanden]

This PR:

• Adds the M1 Github runners to the test_on_push workflow
• Updates the scheduled_tests workflow to test the self-hosted runner across all supported python versions

Closes #187

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (6cb7264) 94.67% compared to head (59653d4) 94.56%.
Report is 1 commits behind head on develop.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #188      +/-   ##
===========================================
- Coverage    94.67%   94.56%   -0.11%     
===========================================
  Files           44       44              
  Lines         1823     1823              
===========================================
- Hits          1726     1724       -2     
- Misses          97       99       +2     

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[agriyakhetarpal]

Thanks, @BradyPlanden – please feel free to merge if you think the failing test is flaky