ci(i): Update codecov to v4

[fredcarle]

Relevant issue(s)

Resolves #2668

Description

I noticed that someone on the codecov repo mentioned that v4 fixed their issue codecov/codecov-action#598 (comment). Trying it :)

[AndrewSisley]

LGTM, hopefully this improves things - thanks for looking in to it :)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 78.21%. Comparing base (2aeddc1) to head (7afae35).

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #2669      +/-   ##
===========================================
+ Coverage    76.40%   78.21%   +1.81%     
===========================================
  Files          303      303              
  Lines        28212    22996    -5216     
===========================================
- Hits         21555    17986    -3569     
+ Misses        5299     3655    -1644     
+ Partials      1358     1355       -3     

Flag	Coverage Δ
all-tests	78.21% <ø> (+1.81%)	⬆️

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see 274 files with indirect coverage changes

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[shahzadlone]

Nice! Thanks for doing this.

https://docs.codecov.com/docs/codecov-uploader#supporting-token-less-uploads-for-forks-of-open-source-repos-using-codecov