ref(mediators): Turn project rule creator to dataclass

[Christinarlong]

Turns Creator -> ProjectRuleCreator to dataclass and update uses to be explicit in passing in params

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

:white_check_mark: All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #79137      +/-   ##
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+ Coverage   78.29%   78.31%   +0.01%     
==========================================
  Files        7133     7134       +1     
  Lines      314191   314644     +453     
  Branches    51320    51419      +99     
==========================================
+ Hits       246007   246416     +409     
- Misses      61748    61767      +19     
- Partials     6436     6461      +25