Implement a scheduled GitHub Actions job that runs the tests against the latest commit of every direct dependency

[Gallaecio]

Work in progress, and up for grabs.

The Linux part is done. The next step would be to extend it to Windows and macOS.

Resolves #5291

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 88.53%. Comparing base (180bc9b) to head (0efeb94).
Report is 10 commits behind head on master.

❗ Current head 0efeb94 differs from pull request most recent head 566cb38. Consider uploading reports for the commit 566cb38 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5303      +/-   ##
==========================================
+ Coverage   85.00%   88.53%   +3.53%     
==========================================
  Files         161      163       +2     
  Lines       11962    10616    -1346     
  Branches     1872     1558     -314     
==========================================
- Hits        10168     9399     -769     
+ Misses       1512      942     -570     
+ Partials      282      275       -7     

see 162 files with indirect coverage changes