[release/3.0] Split out non concurrent test collections.

[github-actions]

Backport of #6937 to release/3.0

/cc @michaelgsharp

Customer Impact

Improves the testing process for PR's to better facilitate us getting PR's out.

Testing

All tests pass with new changes and only test assemblies are changed.

Risk

None, only test assemblies are changed.

[ericstj]

LGTM. This is failing because it's still using the old preview 3 SDK. Need to merge the SDK / arcade update PR.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (4f268c7) 68.80% compared to head (4f268c7) 68.80%.

❗ Current head 4f268c7 differs from pull request most recent head ba573cd. Consider uploading reports for the commit ba573cd to get more accurate results

Additional details and impacted files

@@             Coverage Diff              @@
##           release/3.0    #6947   +/-   ##
============================================
  Coverage        68.80%   68.80%           
============================================
  Files             1240     1240           
  Lines           249601   249601           
  Branches         25509    25509           
============================================
  Hits            171738   171738           
  Misses           71262    71262           
  Partials          6601     6601           

Flag	Coverage Δ
Debug	68.80% <0.00%> (ø)
production	63.27% <0.00%> (ø)
test	88.41% <0.00%> (ø)

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[michaelgsharp]

Closing so that the bot can fix the conflict now that the arcade changes are in.