Add metadata input file coverage report

[gilrrei]

Description

Since the metadata files contain the possible input options, we could add a type of coverage check, that checks which input options are set for the close to 2000 input files during testing

Possible Solution and Definition of Done

Python script:

• Load the metadata file and create a counter object from it
• Load each input file and count the appearances of each option
• Add the appearances to the counter object
• Spit out a number, which options were not hit and maybe some statistics

Moved from 4C-multiphysics/4C#529 to FourCIPP