Hello MAPIE team
Been happily using MAPIE for a while now. Filling this because I'm not sure if the regression is intended from the 0.9.0 release or not.

Describe the bug
Failing to load previously trained MAPIE models

ModuleNotFoundError: No module named 'mapie.conformity_scores.residual_conformity_scores'

To Reproduce

• Trained MapieRegressor instanced over LinearRegression and RandomForest using MAPIE==0.8.4
• Pickled them with joblib
• Loading them to memory again with MAPIE < 0.9.0 (up to 0.8.6) works fine
• With MAPIE 0.9.0 I get this error: ModuleNotFoundError: No module named 'mapie.conformity_scores.residual_conformity_scores'

Expected behavior
A clear and concise description of what you expected to happen.

Screenshots
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Desktop (please complete the following information):

• OS: Ubuntu on WSL Windows 11
• Browser Firefox
• MAPIE Version work with 0.8.6, breaks with 0.9.0
• Python version: tested with 3.12.5

Additional context
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