fix: ensure scikit-learn package name consistency in library imports

[HarshaVardhanMannem]

Fix: Correct scikit-learn package name in dependency installation

Problem

When users try to import sklearn in their evaluation scripts, they might get confused about the correct package name for installation.

Solution

Added logic to ensure users are directed to install the correct package name scikit-learn instead of sklearn when dependencies are missing.

#Previous Import error message:
ImportError: To be able to use evaluate-metric/accuracy, you need to install the following dependencies['scikit-learn'] using 'pip install sklearn' for instance'

#Correct Import error message:
ImportError: To be able to use evaluate-metric/accuracy, you need to install the following dependencies['scikit-learn'] using 'pip install scikit-learn' for instance'

Changes

library_import_name = "scikit-learn" if library_import_name == "sklearn" else library_import_name
library_import_path = "scikit-learn" if library_import_name == "scikit-learn" else library_import_path

Impact

Users will now receive the correct installation command (pip install scikit-learn) instead of the incorrect one (pip install sklearn) when the package is not installed, preventing confusion and ensuring successful package installation.