* paraview: adding variants to use external packages as internal do not compile

* paraview: add latest paraview version

* catalyst: fixed libvtkexpat undefined reference linking error in Catalyst 5.5

* catalyst: add latest catalyst version

* catalyst: added ParaView_DIR env variable to catalyst module

* add paraview, catalyst patches

- https://gitlab.kitware.com/vtk/vtk-m/merge_requests/1166
- https://gitlab.kitware.com/paraview/paraview/merge_requests/2433
- https://gitlab.kitware.com/paraview/paraview/merge_requests/2436

* - Handle updated library paths for catalyst.

  Versions 5.4 and old places libraries under a paraview subdirectory.
  Eg, "lib/paraview-5.4", they are now placed directly under "lib"

- Minor code style cleanup

* Handle update library and python paths for ParaView-5.5

* catalyst: added ParaView_DIR path to spack_env

* BUG: applied the patch to the extracted catalyst source files

* paraview: added missing self to a member variable

* paraview: added Paraview_DIR to env

* catalyst: added osmesa variant

* of-catalyst: added new package

* add (FOAM,WM)_PROJECT_DIR  also to spack_env environment

* depends on first openfoam release supporting catalyst

* openfoam-com: added missing env variables to module generation

* openfoam: fixed flake8 errors

* of-catalyst: added full variant and openfoam version dependency

* paraview: adding variants to use external packages as internal do not compile

* catalyst: fixed libvtkexpat undefined reference linking error in Catalyst 5.5

* catalyst: added ParaView_DIR env variable to catalyst module

* add paraview, catalyst patches

- https://gitlab.kitware.com/vtk/vtk-m/merge_requests/1166
- https://gitlab.kitware.com/paraview/paraview/merge_requests/2433
- https://gitlab.kitware.com/paraview/paraview/merge_requests/2436

* - Handle updated library paths for catalyst.

  Versions 5.4 and old places libraries under a paraview subdirectory.
  Eg, "lib/paraview-5.4", they are now placed directly under "lib"

- Minor code style cleanup

* Handle update library and python paths for ParaView-5.5

* catalyst: added ParaView_DIR path to spack_env

* BUG: applied the patch to the extracted catalyst source files

* of-catalyst: added new package

* add (FOAM,WM)_PROJECT_DIR  also to spack_env environment

* depends on first openfoam release supporting catalyst

* paraview: added missing self to a member variable

* openfoam-com: added missing env variables to module generation

* openfoam: fixed flake8 errors

* paraview: added Paraview_DIR to env

* catalyst: added osmesa variant

* of-catalyst: added full variant and openfoam version dependency

* paraview-catalyst: use always external expat and netcdf

* of-catalyst: reformatted package description

* paraview-catalyst: removed duplicated function

* catalyst: fixed flake8 error

* of-catalyst: fixed license header

* of-catalyst: minor changes

* of-catalyst: renamed gitrepo with git

* of-catalyst: removed useless gitrepo parameter