api: add support for no interp (interp_order=0)

[mloubout]

No description provided.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 83.46%. Comparing base (5be06e1) to head (93546d8).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2885      +/-   ##
==========================================
+ Coverage   83.44%   83.46%   +0.01%     
==========================================
  Files         248      248              
  Lines       51371    51381      +10     
  Branches     4430     4431       +1     
==========================================
+ Hits        42868    42884      +16     
+ Misses       7750     7746       -4     
+ Partials      753      751       -2     

Flag	Coverage Δ
pytest-gpu-aomp-amdgpuX	68.80% <33.33%> (-0.01%)	⬇️
pytest-gpu-gcc-	78.05% <100.00%> (+0.01%)	⬆️
pytest-gpu-icx-	77.67% <100.00%> (+0.01%)	⬆️
pytest-gpu-nvc-nvidiaX	69.31% <33.33%> (-0.01%)	⬇️

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