[FEATURE] Add z-score for the normalization processor

[samuel-oci]

Is your feature request related to a problem?

Currently the normalization processor doesn't support z-score which is a popular technique and according in some instances produces superior results to min-max see blog

What solution would you like?

Allow to specify z-score as a normalization technique in the normalization processor

What alternatives have you considered?

Not much at the moment but suggestions are welcome.

Do you have any additional context?

see blog mentioned earlier