Adjusted the fluid build system so that plugins that depend on numpy can be compiled as well.
Note that in this commit numpy support is still disabled. It can be enabled by re-running the Mantaflow update script with USE_NUMPY=1 and enabling WITH_MANTA_NUMPY in extern/mantaflow/CMakeLists.txt. This will happen in a future commit.
No longer including unused dependencies. Should numpy IO be needed at some point, the Manta source update script can be configured so that the required dependencies are included again.
Includes preprocessed Mantaflow source files for both OpenMP and TBB (if OpenMP is not present, TBB files will be used instead).
These files come directly from the Mantaflow repository. Future updates to the core fluid solver will take place by updating the files.
Reviewed By: sergey, mont29
Maniphest Tasks: T59995
Differential Revision: https://developer.blender.org/D3850
