🔨 Remove usage of internal sklearn.utils api, replace with equivalent

[RozeQz]

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name: "Pull request"
about: Make changes in scikit-uplift

📑 Description of the Change

I was trying to use this library with the modern version of sklearn in which they moved function check_matplotlib_support to the _optional_dependencies folder which looks like an internal one and thus can be moved again later. To properly solve this, I copied the implementation of this function to our utils.

Verification Process

I tested a new version of library in my project and also checked it in existing tests.

Release Notes

• Remove usage of internal sklearn.utils.check_matplotlib_support api and replace with equivalent