Update(ci): github action's artifact upgrade v4

[alleeclark]

Before submitting

• Was this discussed/agreed via a Github issue? (no need for typos and docs improvements)
• Did you read the contributor guideline, Pull Request section?
• Did you make sure to update the docs?
• Did you write any new necessary tests?

What does this PR do?

• Updates actions's artifacts from v3 to v4
• Adds the merge-multiple to download so artifacts will get loaded into the same directory

We received the email below stating that we need to upgrade by January.

Here is the recommended upgrade guide that I followed.

PR review

Anyone in the community is free to review the PR once the tests have passed.
If we didn't discuss your PR in GitHub issues there's a high chance it will not be merged.

Did you have fun?

Make sure you had fun coding 🙃

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 78%. Comparing base (0a97def) to head (76a67ae).
Report is 1 commits behind head on main.

Additional details and impacted files

@@         Coverage Diff         @@
##           main   #435   +/-   ##
===================================
  Coverage    78%    78%           
===================================
  Files        35     35           
  Lines      5106   5106           
===================================
  Hits       4006   4006           
  Misses     1100   1100