Packages Inference: Clean Code, refactor to real unittest

[guillaume-chervet]

Unit test should not use a real generated model loaded from hard drive or other external dependencies.
We want to reactivate code coverage inside github action file because actual code does not work with.
Use Depency Injection.

note: code is inside
/Packages/inference

MLOpsPython/packages/inference/src/mlopspython_inference/inference_pillow.py

Line 26 in 2f90295

class Inference:

[guillaume-chervet]

.