chore: turbo cache coverage

[almeidx]

Please describe the changes this PR makes and why it should be merged:
Cache coverage directories on the test pipeline
There's a chance this will fix the wack coverage reports by codecov on pull requests

Status and versioning classification:

[vercel]

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2 Ignored Deployments

Name	Status	Preview	Updated
discord-js	⬜️ Ignored (Inspect)		Nov 19, 2022 at 9:50PM (UTC)
discord-js-guide	⬜️ Ignored (Inspect)		Nov 19, 2022 at 9:50PM (UTC)

[codecov]

Codecov Report

Merging #8836 (014e6d8) into main (e74aa7f) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main    #8836   +/-   ##
=======================================
  Coverage   85.61%   85.61%           
=======================================
  Files          96       95    -1     
  Lines        9459     9462    +3     
  Branches     1134     1132    -2     
=======================================
+ Hits         8098     8101    +3     
  Misses       1319     1319           
  Partials       42       42           

Flag	Coverage Δ
brokers	65.24% <ø> (ø)
builders	98.65% <ø> (ø)
collection	100.00% <100.00%> (ø)
proxy	81.53% <ø> (ø)
rest	91.97% <ø> (ø)
util	100.00% <ø> (ø)
utilities	?
voice	63.70% <ø> (ø)
ws	59.83% <ø> (ø)

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Impacted Files	Coverage Δ
packages/collection/src/collection.ts	100.00% <100.00%> (ø)
packages/actions/src/formatTag/formatTag.ts

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