Allow user to supply instructions for Validation Framework CLI in form of a file, and ensure that each VF run creates such a file for possible rerun.

Details:
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The user should be able to create a yaml file and give that file through the CLI.

The file file will contains:

    a list of  groups or validations name they wanna run
    if they use groups, a list of validations they wanna exclude maybe
    list of the parameters and their values they want to override...

The file structure will have to be decided (like what we have for the validations metadata)

Rationale: Some users/customers will probably want to run always what they want to run and having the ability to feed a yaml file with what they want will avoid them to script or typing complex arguments in the CLI.

Execution of VF run would produce just such a file, alongside existing logs.

Implement a registry mechanism for a given validation run. This will associate a run UUID with the exact instructions for the run.