General: Bump HIP backend to ROCm 7.1+

[stotko]

The maturity of ROCm/HIP still lacks significantly behind CUDA, but it has further improved. Especially CMake support via provided Config Mode files looks promising and has some advantages over CUDA. However, host compiler support (beyond hipcc) is still pretty much non-existent. Bump the required ROCm/HIP version to 7.1 and update the thrust module to rely on rocthrust detection. This should hopefully make the HIP backend less prone to incompatible upstream changes.

Note that the HIP backend is still considered experimental.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 96.79%. Comparing base (42ea5ea) to head (47632a9).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #470      +/-   ##
==========================================
+ Coverage   96.64%   96.79%   +0.15%     
==========================================
  Files          33       33              
  Lines        2622     2622              
==========================================
+ Hits         2534     2538       +4     
+ Misses         88       84       -4     

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