Fix Python package license metadata deprecations

[jtrobles-cdd]

• license must be a valid SPDX license expression.
• License classifiers are deprecated and have been superseded by license expressions (see PEP 639).
• Add license-files to specify the license file. (Not related to the deprecations.)

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 88.90%. Comparing base (c721c04) to head (b96f280).
⚠️ Report is 2 commits behind head on develop.

Additional details and impacted files

@@           Coverage Diff            @@
##           develop     #925   +/-   ##
========================================
  Coverage    88.90%   88.90%           
========================================
  Files           40       40           
  Lines         3759     3759           
  Branches       389      389           
========================================
  Hits          3342     3342           
  Misses         265      265           
  Partials       152      152           

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