Re-enable testing for the PyTorch adapter

[SpecLad]

Motivation and context

It was accidentally disabled in #6173.

Also, refactor the build steps to make the log easier to read.

How has this been tested?

Checklist

• I submit my changes into the develop branch
• [ ] I have added a description of my changes into the CHANGELOG file
• [ ] I have updated the documentation accordingly
• [ ] I have added tests to cover my changes
• [ ] I have linked related issues (see GitHub docs)
• [ ] I have increased versions of npm packages if it is necessary
  (cvat-canvas,
  cvat-core,
  cvat-data and
  cvat-ui)

License

• I submit my code changes under the same MIT License that covers the project.
  Feel free to contact the maintainers if that's a concern.

[codecov]

Codecov Report

Merging #6377 (b95baa4) into develop (8590e90) will increase coverage by 7.74%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           develop    #6377      +/-   ##
===========================================
+ Coverage    72.90%   80.65%   +7.74%     
===========================================
  Files          300      331      +31     
  Lines        36882    38431    +1549     
  Branches      3594     6923    +3329     
===========================================
+ Hits         26890    30995    +4105     
+ Misses        9986     7121    -2865     
- Partials         6      315     +309     

Components	Coverage Δ
cvat-ui	74.68% <ø> (-0.01%)	⬇️
cvat-server	86.18% <ø> (+15.07%)	⬆️