updates to run with mac/linux

[ktehranchi]

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Description of Pull Request

• Specify environment versions correctly.
• Updates to run_scenarios.ipynb and generate_reports to enable running with mac/linux os
• New cells in run_scenarios to help with cleaning model_workspaces
• The summary reports still fails on mac, but i made changes so user can manually run the notebook without throwing an error. The root of the issue is that with macOS using the os.system() to call jupyter nbconvert --execute will not recognize the conda environment you have enabled, and instead default to the root environment.... I couldn't figure out a solution to this.

[ktehranchi]

Like I mentioned in my email. This hardcodes cbc as the solver and ignore the other solver options specified in the xlsx for model inputs.