Update build workflow to upload codecov file

[samirsilwal]

Changes

• Update build-test workflow to use codecov upload action instead of codecov package
• Remove deprecated codecov package

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 87.75%. Comparing base (16d8b7d) to head (18084c8).
Report is 21 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #145   +/-   ##
=======================================
  Coverage   87.75%   87.75%           
=======================================
  Files           5        5           
  Lines         147      147           
  Branches       25       25           
=======================================
  Hits          129      129           
  Misses         15       15           
  Partials        3        3           

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[samirsilwal]

@mesaugat Looks like its working. Lets merge it 🥳