Some attacks should not require distillation/shadow model configurations

[johanos1]

Issue

Problem Description

When creating the attacks, a distillation and shadow model path must be provided. This does not make sense if such attacks are not used.

Expected Behavior

Leakpro should run even if not fed with the paths to distillation and shadow models.

What Needs to be Done

Make a functions in MIAFactory to tell what is required from a given attack configuration.

How Can It Be Tested or Reproduced

Ensure Leakpro runs when subsets of attacks are included and when the paths to distillation and shadows are not present.