examples: Add more device-specific examples to HIP backend

[stotko]

Based on the recent HIP backend update (see #470), the general support seems to be good enough to test more examples. Include the missing examples to match the ones in the CUDA and OpenMP backend.

Note that the HIP backend is still considered experimental.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 96.60%. Comparing base (c25d4bd) to head (740e766).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #471   +/-   ##
=======================================
  Coverage   96.60%   96.60%           
=======================================
  Files          33       33           
  Lines        2622     2622           
=======================================
  Hits         2533     2533           
  Misses         89       89           

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