Fix archspec on windows

[isuruf]

by fixing the check for non native subdirs and adding a lower bound on archspec.

Fixes #13640

Description

Checklist - did you ...

• Add a file to the news directory (using the template) for the next release's release notes?
• Add / update necessary tests?
• Add / update outdated documentation?

[codspeed-hq]

CodSpeed Performance Report

Merging #13641 will not alter performance

_{Comparing isuruf:archspec_win (1bb961a) with main (0f8fb58)}

Summary

✅ 21 untouched benchmarks

[isuruf]

pre-commit.ci autofix

[jezdez]

I would feel better if we'd add a test to verify the behavior for this