Release 2.0.x registry cleanup

[williamblevins]

Change Description

Breakdown the base-images pipeline in pinned and unpinned to improve image registry structures and isolation.

Change Type

Select ONE:

• [ ] Documentation
• [ ] Stability bug fix
• [X] Other
• [ ] Other - special case

Testing Changes

Select ANY that apply:

• [ ] New Tests
• [ ] Existing Tests
• [ ] Test Framework
• [X] CI System
• [ ] Other

Consensus Changes

• [ ] Consensus Changes

API Changes

• [ ] API Changes

Documentation Additions

• [ ] Documentation Additions

[williamblevins]

Also, I think the pinned platform file for 10.14 needs to be updated as some required library is missing.