Fix wasm compilation issues with emsdk 3.1.60
- closes #19356 (closed)
- closes #19358 (closed)
- Provides the .js files in both build and install interface.
- This fixes the use case where someone links to an installed VTK, rather than doing so from the buildsystem.
- Fixes an undefined variable error from octree_node.txx, somehow this escaped until emcc 3.1.60 was used (newer clang)
Edited by Mathieu Westphal (Kitware)