Use interleave() instead of zip_low()/zip_high() for better perf on AVX2

[Shnatsel]

This is done but can't be merged until linebender/fearless_simd#206 is published

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.76%. Comparing base (f98c3cd) to head (ce04413).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #116      +/-   ##
==========================================
- Coverage   98.77%   98.76%   -0.01%     
==========================================
  Files          10       10              
  Lines        2856     2844      -12     
==========================================
- Hits         2821     2809      -12     
  Misses         35       35              

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.