chore: codecov follow ups

[HuiSF]

Description of changes

1. re-enable using cached package-list.json in GH actions
2. removed the unused codecov package from the workspace (this npm package has been deprecated)

Issue #, if available

Description of how you validated changes

Checklist

• PR description included
• yarn test passes
• Tests are changed or added
• Relevant documentation is changed or added (and PR referenced)

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (bdaee91) 83.65% compared to head (37b7569) 88.02%.
Report is 986 commits behind head on main.

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Additional details and impacted files

@@            Coverage Diff             @@
##             main   #12892      +/-   ##
==========================================
+ Coverage   83.65%   88.02%   +4.37%     
==========================================
  Files         341      663     +322     
  Lines       21579    18141    -3438     
  Branches     4611     3635     -976     
==========================================
- Hits        18051    15969    -2082     
+ Misses       3241     2172    -1069     
+ Partials      287        0     -287     

Flag	Coverage Δ
adapter-nextjs	98.64% <ø> (?)
analytics	62.75% <ø> (?)
api	∅ <ø> (?)
api-graphql	87.71% <ø> (?)
api-rest	96.28% <ø> (?)
auth	86.78% <ø> (?)
aws-amplify	100.00% <ø> (?)
core	88.02% <ø> (?)
datastore	89.95% <ø> (?)
datastore-storage-adapter	88.13% <ø> (?)
geo	90.12% <ø> (?)
interactions	96.10% <ø> (?)
notifications	90.35% <ø> (?)
predictions	86.00% <ø> (?)
pubsub	94.70% <ø> (?)
rtn-push-notification	100.00% <ø> (?)
storage	91.28% <ø> (?)

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