Regridding weights not properly reused

[bstdenis]

It seems like the regridding weights in regrid_dataset are not reused as expected from the weights_location keyword.

The kwargs set at

xscen/src/xscen/regrid.py

Line 132 in 9998180

kwargs["weights"] = weights_filename

are not passed to xe.Regridder? They should be assigned to regridder_kwargs instead of kwargs

xscen/src/xscen/regrid.py

Line 142 in 9998180

ds_in=ds, ds_grid=ds_grid, filename=weights_filename, **regridder_kwargs

Some benchmarks with the original code:
Initial regrid dataset in fn test_xarray_regrid took 18.9291 seconds
Second regrid dataset in fn test_xarray_regrid took 13.4746 seconds

And by assigning 'weights' and 'reuse_weights' to regridder_kwargs
Initial regrid dataset in fn test_xarray_regrid took 16.8666 seconds
Second regrid dataset in fn test_xarray_regrid took 4.2991 seconds

Fixed in f12895a