interp2d deprecation

It seems that fluidimage.calcul.smooth_clean uses interp2d from SciPy which is going to get deprecated.

I get the following message:

  /home/jsalort/Documents/Python/fluidimage/fluidimage/calcul/smooth_clean.py:51: DeprecationWarning: `interp2d` is deprecated!
  `interp2d` is deprecated in SciPy 1.10 and will be removed in SciPy 1.13.0.
  
  For legacy code, nearly bug-for-bug compatible replacements are
  `RectBivariateSpline` on regular grids, and `bisplrep`/`bisplev` for
  scattered 2D data.
  
  In new code, for regular grids use `RegularGridInterpolator` instead.
  For scattered data, prefer `LinearNDInterpolator` or
  `CloughTocher2DInterpolator`.
  
  For more details see
  `https://scipy.github.io/devdocs/notebooks/interp_transition_guide.html`
  
    fxs = interp2d(ixvecs, iyvecs, dxs_smooth, kind="linear")

I am not sure which of the replacements would be suited to our needs. I assume that it would make sense to move to the newer alternatives, and not those that are bug-for-bug compatible with interp2d, so probably LinearNDInterpolator.

Thoughts ?