chore(ci): use new Codecov uploader for reporting code coverage

[bednar]

Proposed Changes

The Codecov Bash Uploader is deprecated - https://docs.codecov.com/docs/about-the-codecov-bash-uploader. We have to switch to new one - https://docs.codecov.com/docs/codecov-uploader.

Checklist

• CHANGELOG.md updated
• Rebased/mergeable
• mvn test completes successfully
• Commit messages are in semantic format
• Sign CLA (if not already signed)

[codecov-commenter]

Codecov Report

Merging #304 (62c7d19) into master (4ddda00) will increase coverage by 0.03%.
The diff coverage is n/a.

❗ Current head 62c7d19 differs from pull request most recent head 9b1ef44. Consider uploading reports for the commit 9b1ef44 to get more accurate results

@@             Coverage Diff              @@
##             master     #304      +/-   ##
============================================
+ Coverage     88.93%   88.97%   +0.03%     
  Complexity      473      473              
============================================
  Files           149      149              
  Lines          5984     6005      +21     
  Branches        290      290              
============================================
+ Hits           5322     5343      +21     
  Misses          580      580              
  Partials         82       82              

Impacted Files	Coverage Δ
...luxdb/client/kotlin/internal/QueryKotlinApiImpl.kt	94.80% <0.00%> (+0.77%)	⬆️
...luxdb/client/kotlin/internal/WriteKotlinApiImpl.kt	94.11% <0.00%> (+2.81%)	⬆️

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