I have never used it but in your VTK source there will be a folder called Remote it may already have PoissonReconstruction.remote.cmake and Powercrust.remote.cmake in it. If not, download the files and put them in the Remote folder.
Then go to where you build VTK and run cmake-gui. In the VTK section, you will see a line called VTK_MODULE_ENABLE_VTK_PoissonReconstruction. Set the value to WANT and do the same for for VTK_MODULE_ENABLE_VTK_Powercrust. Then rebuild VTK.
The new names are VTK_MODULE_ENABLE_VTK_* not Module_*. If you get it working, let me know and I’ll update the instructions.