Move output out of the simulation_IO dictionary

[lymereJ]

Currently, output is included in the simulation_IO dictionary of verification items. This makes sense for simulation-based verifications but not for verifications relying solely on CSV files for verifications, for instance coming out of a BAS. output should probably also be renamed to something like data_path or path_to_data to clearly state what its general purpose is.

ConStrain/demo/G36_demo/data/G36_library_verification_cases.json

Line 10 in 77fb0af

"output": "./demo/G36_demo/data/G36_Modelica_Jan.csv",