Merge branch 'SPI-2011' into 'master'

Add environment to torch

Closes SPI-2011

See merge request !991

cmake/environment/torch.template

+PYPATH=`find -L ${TORCH__HOME} -maxdepth 3 -type d -name "site-packages"`
+LD_LIBRARY_PATH=${PYPATH}/torch/lib:${LD_LIBRARY_PATH}
+export LD_LIBRARY_PATH

pyexternals/CMakeLists.txt

@@ -4293,6 +4293,7 @@ LCGPackage_Add(
           IF DEFINED cuda_native_version THEN cuda cudnn ENDIF
           IF Python_native_version VERSION_LESS 3 THEN typing future ENDIF
 	  IF <VERSION> VERSION_GREATER_EQUAL 1.9.0 THEN typing_extensions ENDIF
+  REVISION 2
 )
 
 #---torchvision-----------------------------------------------------------------------