Refactor / Remove the Task Templating Mechanism

[popescu-v]

Description

Currently, the task templating mechanism allows khiops-python to instantiate Khiops scenarios based on input parameters specified through the khiops.core API.

In Khiops 11 there is a JSON-based templating mechanism which does essentially the same thing

Questions/Ideas

• The goal of this issue is to:

  • reduce the templating mechanism to providing a JSON file storing the scenario attributes and pairing it with a scenario template that Khiops Core can consume
  • outsource to Khiops core the template instantiation into scenarios (with all associated error checking).

• We need to see whether and how the scenario templates can be mutualized / centralized between Khiops Core and Khiops Python.

• We also need to see whether the Core API function argument preprocessing can be simplified (passage from None to different default values, etc).

[popescu-v]

Confirm that on the Khiops side the types of the fields are checked.
If not, use the Python type hints on the API side (the types module).

[popescu-v]

We can start by unregistring each task one by one (replace it with a bare-bones Python task dictionary).