Remove install job, use setup-node's yarn cache

[trevor-scheer]

Context

We're already using the yarn cache in setup-node, so yarn install is cheap. Caching node_modules is extra work and possibly even slower.

Changes

Remove install step that manually caches node_modules. Just run yarn install in jobs where it's needed.

[changeset-bot]

⚠️ No Changeset found

Latest commit: af325fb

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 63.96%. Comparing base (4627bed) to head (af325fb).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #4202   +/-   ##
=======================================
  Coverage   63.96%   63.96%           
=======================================
  Files          35       35           
  Lines        3086     3086           
  Branches      948      948           
=======================================
  Hits         1974     1974           
  Misses       1107     1107           
  Partials        5        5           

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