Update PackageInfo.g and CI suite

[stertooy]

This PR updates all actions used in the CI workflow to the latest version, and makes use of the new Dependencies.NeededSystemPackages field in PackageInfo.g to simplify the CI workflow(s).

Remarks:

• The Dependencies.ExternalConditions is empty. Since this package relies on external software, it probably shouldn't be.
• I used libcurl4-gnutls-dev like in this package's documentation, but the package distribution currently uses libcurl4-openssl-dev.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 96.0%. Comparing base (35d0cd2) to head (54ee340).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@          Coverage Diff           @@
##           master     #56   +/-   ##
======================================
  Coverage    96.0%   96.0%           
======================================
  Files           3       3           
  Lines         151     151           
  Branches       15      15           
======================================
  Hits          145     145           
  Misses          2       2           
  Partials        4       4           

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[fingolfin]

Thanks!