test: cross test merged rules (partial)

[antfu]

Part of #482 Stage 2

This PR runs both JS/TS tests against each merged rule, to ensure the merged rules works the same with both JS/TS parsers.

There are some rule failing, this PR marks them as // TODO: Stage 2: Test merged rule (you can find them with a global search).

After those rules are migrated, we can then consider Stage 2 as finished.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.73%. Comparing base (7c7301e) to head (8cf58f5).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #520   +/-   ##
=======================================
  Coverage   99.73%   99.73%           
=======================================
  Files         120      120           
  Lines       19521    19521           
  Branches     4740     4742    +2     
=======================================
  Hits        19470    19470           
  Misses         51       51           

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