Update HC4 Regressions with Test Topics

[ToluClassics]

No description provided.

[lintool]

Discussed over slack, but adding here for reference:

https://arxiv.org/pdf/2201.09992.pdf

table 1 calls the splits train/eval - should we rename the same way?

[codecov-commenter]

Codecov Report

Merging #1924 (7d7ef81) into master (8010d5c) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master    #1924   +/-   ##
=========================================
  Coverage     58.67%   58.67%           
  Complexity     1079     1079           
=========================================
  Files           180      180           
  Lines         10420    10420           
  Branches       1429     1429           
=========================================
  Hits           6114     6114           
  Misses         3786     3786           
  Partials        520      520           

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[lintool]

Paper refs, 👍