chore: migrate codecov from bash to github action

[shadowsheep1]

Short description

This PR migrates codecov from bash to github action.

How to test

Run static check. See https://github.com/pagopa/io-dev-api-server/actions/runs/8892023803/job/24415706764

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 70.06%. Comparing base (f607d8e) to head (43f2bd3).
Report is 25 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #373      +/-   ##
==========================================
- Coverage   70.38%   70.06%   -0.32%     
==========================================
  Files         141      151      +10     
  Lines        4656     4791     +135     
  Branches      565      552      -13     
==========================================
+ Hits         3277     3357      +80     
- Misses       1308     1433     +125     
+ Partials       71        1      -70     

see 24 files with indirect coverage changes

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