SPI-1941: Update scikit-learn to 0.24.2 from 0.21.2 needed by SPI-1941

For Python3 update:

• joblib to 1.0.1
• numpy to 1.21.1
• scipy to 1.7.0
• add threadpoolctl

Add new packages needed by scipy 1.7.0: Dmitri Konstantinov authored 13 minutes ago

• beniget-0.4.0
• pybind11-2.6.2
• ply-3.11
• pythran-0.9.12.post1

SPI-1941