Deprecate direct invocation of setup.py

[Laerte]

Closes #5774

We don't need to install setuptools and wheel packages anymore in publish workflow because build create a virtual environment in order to build the package. We don't need to pass any argument to build command because the default behaviour already create a wheel/source distribution

[codecov]

Codecov Report

Merging #5776 (577001c) into master (7ae32ea) will increase coverage by 0.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #5776      +/-   ##
==========================================
+ Coverage   84.82%   84.84%   +0.01%     
==========================================
  Files         162      162              
  Lines       10974    10974              
  Branches     1795     1795              
==========================================
+ Hits         9309     9311       +2     
+ Misses       1394     1393       -1     
+ Partials      271      270       -1     

Impacted Files	Coverage Δ
scrapy/core/downloader/__init__.py	92.48% <0.00%> (+1.50%)	⬆️

[wRAR]

I guess checking the publish action can only be done during the next release preparation :)

[Gallaecio]

Thanks!