Setup and tested OLMo architecture adapters

[jlarson4]

Added an Architecture Adapter for the OLMo family of architectures. They were all quite similar and easy to implement as a group thanks to the work already done on HookedTransformer for OLMo. The base OLMo model has an issue where it appends a "EOS" token to inputs, which was causing static generation. This bug was resolved in bridge.py and transformers.py to make sure that token is not added unexpectedly.

• New feature (non-breaking change which adds functionality)

Checklist:

• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• I have not rewritten tests relating to key interfaces which would affect backward compatibility