maint: small test improvements

[smartcontracts]

Various small test improvements, playing around with what the ai can easily do.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.24%. Comparing base (ad5d859) to head (6aba831).
Report is 3 commits behind head on develop.

Additional details and impacted files

@@             Coverage Diff              @@
##           develop   #16342       +/-   ##
============================================
+ Coverage    81.55%   96.24%   +14.68%     
============================================
  Files          161      106       -55     
  Lines         8866     4583     -4283     
============================================
- Hits          7231     4411     -2820     
+ Misses        1502      172     -1330     
+ Partials       133        0      -133     

Flag	Coverage Δ
cannon-go-tests-64	?
contracts-bedrock-tests	96.24% <ø> (ø)

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see 55 files with indirect coverage changes

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