Follow up PR: Removes BetaProgramInitiator, Global is Global, return backward compatibility

[vzotova]

Type of PR:

• [ ] Bugfix
• [X] Feature
• [ ] Documentation
• [ ] Other

Required reviews:

• [ ] 1
• [X] 2
• [ ] 3

What this does:

High-level idea of the changes introduced in this PR. List relevant API changes (if any), as well as related PRs and issues.

Issues fixed/closed:

• Fixes #...

Why it's needed:

Explain how this PR fits in the greater context of the NuCypher Network. E.g., if this PR address a nucypher/productdev issue, let reviewers know!

Notes for reviewers: I'd like to have help with naming new GlobalAllowList (to be honest I'd not rename it at all)