contracts: Don't require two code owners for changing the go abi loader

[ajsutton]

Description

We shouldn't need two reviews to change the abi loading code (which has to be in packages/contracts-bedrock due to Go's rules around embedding content). And it should be approved by go reviewers, not contract reviewers.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 75.31%. Comparing base (5f1dcbc) to head (bd2a86e).

Additional details and impacted files

@@             Coverage Diff             @@
##           develop   #18394      +/-   ##
===========================================
- Coverage    75.60%   75.31%   -0.30%     
===========================================
  Files          187      187              
  Lines        11199    11199              
===========================================
- Hits          8467     8434      -33     
- Misses        2586     2621      +35     
+ Partials       146      144       -2     

Flag	Coverage Δ
cannon-go-tests-64	66.58% <ø> (-0.82%)	⬇️
contracts-bedrock-tests	80.21% <ø> (ø)

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see 5 files with indirect coverage changes

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