chore: simplify unit test cache

[dyladan]

Now that we are hoisting modules, the caching step is significantly more efficient than it used to be. Combined with the latest version of the caching action supporting multiple paths properly, this drastically simplifies the caching part of our action and speeds up the tests.

Cache Hit

~2-3 minutes

Cache Miss

~3-4 minutes

[codecov]

Codecov Report

Merging #2435 (16c8900) into main (dbfabd2) will decrease coverage by 0.02%.
The diff coverage is n/a.

❗ Current head 16c8900 differs from pull request most recent head bb76be1. Consider uploading reports for the commit bb76be1 to get more accurate results

@@            Coverage Diff             @@
##             main    #2435      +/-   ##
==========================================
- Coverage   92.70%   92.68%   -0.03%     
==========================================
  Files         137      137              
  Lines        4993     4993              
  Branches     1056     1056              
==========================================
- Hits         4629     4628       -1     
- Misses        364      365       +1     

Impacted Files	Coverage Δ
...emetry-api-metrics/src/platform/node/globalThis.ts	0.00% <0.00%> (-100.00%)	⬇️