Added new SAEBench gemma 2 2b SAEs

[curt-tigges]

Description

As described.

Fixes # (issue)

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

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

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 72.74%. Comparing base (38876b4) to head (6940c9b).
Report is 7 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #378   +/-   ##
=======================================
  Coverage   72.74%   72.74%           
=======================================
  Files          22       22           
  Lines        3266     3266           
  Branches      431      431           
=======================================
  Hits         2376     2376           
  Misses        762      762           
  Partials      128      128           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.