Improve handling of comments in requirements.txt files

[fpgmaas]

PR Checklist

• A description of the changes is added to the description of this PR.
• If there is a related issue, make sure it is linked to this PR.
• If you've fixed a bug or added code that should be tested, add tests!
• Documentation in docs is updated

Description of changes

Resolves #587

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 91.1%. Comparing base (24855ff) to head (2180187).

Additional details and impacted files

@@          Coverage Diff          @@
##            main    #588   +/-   ##
=====================================
  Coverage   91.1%   91.1%           
=====================================
  Files         38      38           
  Lines       1086    1086           
  Branches     224     224           
=====================================
  Hits         990     990           
  Misses        81      81           
  Partials      15      15           

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