cmake: Link static or shared cudart library based on target type

[stotko]

Currently, the shared version of the CUDA runtime library CUDA::cudart is unconditionally linked. However, the static and shared version and incompatible to each other and it is discouraged to link against both. Since CMake implicitly uses the respective variant when linking a target with CUDA sources, building stdgpu as a static library ends up with mixing both, which may cause linker errors especially on Windows. Follow standard CMake behavior and link against the correct variant based on the selected target type.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 96.64%. Comparing base (133f9e2) to head (56443a1).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #469      +/-   ##
==========================================
+ Coverage   96.60%   96.64%   +0.03%     
==========================================
  Files          33       33              
  Lines        2622     2622              
==========================================
+ Hits         2533     2534       +1     
+ Misses         89       88       -1     

☔ 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.