primesieve/count update, add gentoo packages info for them

[dimpase]

📚 primesieve/count update

primesieve and primecount update, add gentoo packages info for them

📝 Checklist

• I have made sure that the title is self-explanatory and the description concisely explains the PR.
• I have linked an issue or discussion.
• I have created tests covering the changes.
• I have updated the documentation accordingly.

A straightforward upgrade

[github-actions]

Documentation preview for this PR is ready! 🎉
Built with commit: 6d0e5fd

[codecov-commenter]

Codecov Report

Patch coverage has no change and project coverage change: -0.01 ⚠️

Comparison is base (f449b14) 88.62% compared to head (6d0e5fd) 88.62%.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop   #35284      +/-   ##
===========================================
- Coverage    88.62%   88.62%   -0.01%     
===========================================
  Files         2148     2148              
  Lines       398653   398653              
===========================================
- Hits        353308   353297      -11     
- Misses       45345    45356      +11     

see 24 files with indirect coverage changes

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[kiwifb]

Looks good to me. Those version have been in use in Gentoo for a bit now. I don't expect any issues.