Update codecov-actions in CI workflows

[f-allian]

• Updated codecov-actions in our CI workflow files (ci-tests.yml and ci-tests-drafts.yml) to allow code coverage uploads from forked pull requests.
• See my comment in PR small changes for JOSS publication #310 for further details.

[github-actions]

🦙 MegaLinter status: ✅ SUCCESS

Descriptor	Linter	Files	Fixed	Errors	Elapsed time
✅ PYTHON	black	36		0	0.97s
✅ PYTHON	pylint	36		0	5.68s

See detailed report in MegaLinter reports

MegaLinter is graciously provided by

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.87%. Comparing base (3a6e2df) to head (f3276c4).
Report is 4 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #311   +/-   ##
=======================================
  Coverage   96.87%   96.87%           
=======================================
  Files          29       29           
  Lines        1856     1856           
=======================================
  Hits         1798     1798           
  Misses         58       58           

---

Continue to review full report in Codecov by Sentry.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 08ab5aa...f3276c4. Read the comment docs.