Upgrade github artifact upload/download actions

[levan-m]

What does this PR do?

Upgrade from deprecated v3 actions.

Motivation

What inspired you to submit this pull request?

Additional Notes

Anything else we should know when reviewing?

Minimum Agent Versions

Are there minimum versions of the Datadog Agent and/or Cluster Agent required?

• Agent: vX.Y.Z
• Cluster Agent: vX.Y.Z

Describe your test plan

Write there any instructions and details you may have to test your PR.

Checklist

• PR has at least one valid label: bug, enhancement, refactoring, documentation, tooling, and/or dependencies
• PR has a milestone or the qa/skip-qa label

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 49.17%. Comparing base (8b4ebea) to head (e75ad56).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1656   +/-   ##
=======================================
  Coverage   49.17%   49.17%           
=======================================
  Files         218      218           
  Lines       21033    21033           
=======================================
  Hits        10342    10342           
  Misses      10150    10150           
  Partials      541      541           

Flag	Coverage Δ
unittests	49.17% <ø> (ø)

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