runtime/internal/lib/internal/cpu: use __cpuid_count

[visualfc]

fix cpu.cpuid error for 386

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 88.01%. Comparing base (cbac24c) to head (56733e1).
⚠️ Report is 8 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1223   +/-   ##
=======================================
  Coverage   88.01%   88.01%           
=======================================
  Files          34       34           
  Lines        8374     8374           
=======================================
  Hits         7370     7370           
  Misses        935      935           
  Partials       69       69           

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