feat(vtk): include all arrays on pathline input

[wpbonelli]

Instead of hardcoding which arrays to include in vtk pathline export, include all numeric arrays present in the pathline data

[codecov]

Codecov Report

Attention: Patch coverage is 53.33333% with 7 lines in your changes are missing coverage. Please review.

Project coverage is 71.0%. Comparing base (029a4e1) to head (1489e0e).
Report is 1 commits behind head on develop.

Additional details and impacted files

@@            Coverage Diff            @@
##           develop   #2161     +/-   ##
=========================================
+ Coverage     68.3%   71.0%   +2.7%     
=========================================
  Files          260     260             
  Lines        57947   58139    +192     
=========================================
+ Hits         39611   41330   +1719     
+ Misses       18336   16809   -1527     

Files	Coverage Δ
flopy/export/vtk.py	78.0% <53.3%> (+9.7%)	⬆️

... and 177 files with indirect coverage changes