Implement script for multisig delegation from v1.1 to current version

[lenkan]

Perhaps this type of test is better suited in GLEIF-IT organization. Opening as Draft for discussion

See #992 and #996 for similar scripts. I have used the same utility functions here. If you want, I can change all other scripts to use them as well. I can also just put these scripts in a separate repository. Let me know.

[pfeairheller]

@m00sey will look at where this can be moved and comment back here.