Address the sunset of macOS 13 runners.

[bcoconni]

According to GitHub announcement, macOS 13 runners will close down on Dec 04, 2025.

This PR migrates our CI workflow to macOS 14 runners and upgrade the version of Matlab used for our testing from R2022a to R2023b (see matlab-actions/setup-matlab#113 for the details).

The job is using Python 3.10 because it always did for macOS 14 runners (see #1030 (comment)) and 3.9 has reached "End of life" anyway.

Bonus point: this removes the need of having 2 jobs for MacOSX (one for x86_64 and another one for Apple Silicon chips).

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 25.24%. Comparing base (0ce2918) to head (11782dd).

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1355   +/-   ##
=======================================
  Coverage   25.24%   25.24%           
=======================================
  Files         169      169           
  Lines       18549    18549           
=======================================
  Hits         4682     4682           
  Misses      13867    13867           

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