[SPI-2153] Adding Pyshtools

Added pyshtools-4.10 requested in SPI-2153. Also added new dependencies missing in lcgcmake:

• pooch-1.6.0
• astropy-5.0.4
• extension_helpers-1.0.0
• pyerfa-2.0.0.1
• xarray-2022.3.0

Mentions SPI-2153