[packaging] Stricter install requirements in setup.cfg

[vkarak]

This fixes the failures of the "wheelvalidation" GH action in random PRs after archspec 0.2.3 release which breaks ReFrame. The problem is the following:

The install_requires in our setup.cfg is too loose, stating only the package names not versions. When the CI tries to create the wheel, it fetches the latest archspec which then breaks us. I've made the install_requires stricter to avoid such problems. We should make sure to update also setup.cfg in the next release of archspec.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 86.66%. Comparing base (8395b49) to head (ba6c62f).

Additional details and impacted files

@@           Coverage Diff            @@
##           develop    #3135   +/-   ##
========================================
  Coverage    86.66%   86.66%           
========================================
  Files           61       61           
  Lines        12092    12092           
========================================
  Hits         10479    10479           
  Misses        1613     1613           

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