Fix CUDA setup order

[iiiian]

CMAKE_CUDA_ARCHITECTURES must be setup before polysolve and polysolve_linear target.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 80.53%. Comparing base (56e0edc) to head (6ddf7c3).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #103   +/-   ##
=======================================
  Coverage   80.53%   80.53%           
=======================================
  Files          49       49           
  Lines        2106     2106           
  Branches      280      280           
=======================================
  Hits         1696     1696           
  Misses        410      410           

Flag	Coverage Δ
polysolve	80.53% <ø> (ø)

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