Work in progress. Plan is to:
- Get this building with OCCT 7.4.0 and SMESH 8.3.0.4
- Get pyOCCT building only OCCT 7.5.0
- Get conda-forge feedstock of SMESH to build with OCCT 7.5.0 and Salome Platform 9.6.0
- Update the sources of this project to OCCT 7.5.0 and SMESH 9.6.0