Rename IntensityNormalizationProcess to IntensityNormalizationTask and adapt to latest ewoks standard

# Conflicts:
#	tomwer/core/process/reconstruction/test/test_saaxis.py

# Conflicts:
#	orangecontrib/tomwer/widgets/reconstruction/test/test_axis.py

- only done for Checbyshev and None
- other modes will raise an error for now.

# Conflicts:
#	tomwer/core/process/reconstruction/nabu/nabuslices.py

# Conflicts:
#	tomwer/core/process/reconstruction/nabu/nabuslices.py
#	tomwer/core/process/reconstruction/nabu/nabuvolume.py

The value where updated only when the mode changed. This was an issue for the scalar value

Compute all variation at the same moment in order to read the dataset once only.