PIP dependency resolver check

[KaunilD]

What

1. added a check for pip version if it is <20.2.*
2. if pip is < 20.2.* then we add a --user-resolver=2020-resolver to the pip install

Why

1. Most of the systems in 2023 have pip versions > 20.2 where the 2020-resolver is a default and no longer needed. explicitly specifying it raises a unidentified resolver error
2. reference: https://pip.pypa.io/en/stable/user_guide/?highlight=2020-resolver#deprecation-timeline

U/X

1. No changes in user flags.