Interpolable for non conforming octree meshes

[ericneiva]

Hello, @JordiManyer and @amartinhuertas,

This PR applies the solution to issue #1269 corresponding to adding an optional vertex_to_cells field to KDTreeSearch to override the default vertex_to_cells when using non-conforming meshes.

I’d rather extract the vertex_to_cells from the triangulation, but this requires, octree meshes to own a non-comforming grid topology.

Lmk if you have any suggestions for improvement. Otherwise, thanks a lot for accepting the PR.

Cheers,
Eric

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 88.85%. Comparing base (3f14453) to head (36b6bd6).
⚠️ Report is 2 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1329   +/-   ##
=======================================
  Coverage   88.85%   88.85%           
=======================================
  Files         228      228           
  Lines       30197    30202    +5     
=======================================
+ Hits        26832    26837    +5     
  Misses       3365     3365           

Flag	Coverage Δ
drivers	39.36% <0.00%> (-0.01%)	⬇️
extensions	4.99% <0.00%> (-0.01%)	⬇️
unit-adaptivity	39.96% <60.00%> (+<0.01%)	⬆️
unit-basics	14.38% <0.00%> (-0.01%)	⬇️
unit-celldata	20.83% <60.00%> (+<0.01%)	⬆️
unit-fespaces-1	32.63% <100.00%> (+0.01%)	⬆️
unit-fespaces-2	39.32% <60.00%> (+<0.01%)	⬆️
unit-fields	17.45% <0.00%> (-0.01%)	⬇️
unit-geometry	28.35% <0.00%> (-0.01%)	⬇️
unit-multifield	30.42% <60.00%> (+<0.01%)	⬆️
unit-odes	28.30% <0.00%> (-0.01%)	⬇️
unit-referencefes	33.89% <0.00%> (-0.01%)	⬇️
unit-visualization	11.66% <0.00%> (-0.01%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Harness.
📢 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.