test(contracts): improve OptimismSuperchainERC20Beacon test coverage

[devin-ai-integration]

Summary

Two small improvements to OptimismSuperchainERC20Beacon.t.sol:

1. Naming fix: Renamed test_implementation_isCorrect_works → test_implementation_isCorrect_succeeds to follow the [method]_[functionName]_[scenario]_[outcome] convention (outcomes must be succeeds/reverts/fails, never works).
2. Version coverage: Added OptimismSuperchainERC20Beacon_Version_Test with test_version_validSemver_succeeds using SemverComp.parse() — follows the same pattern as L1FeeVault, BaseFeeVault, and other beacon/vault test files.

Review & Testing Checklist for Human

• Verify the ISemver cast on the beacon predeploy address is correct — OptimismSuperchainERC20Beacon implements ISemver so this should work, but all tests are currently skipped (vm.skip(true)) and haven't been validated against a live deployment
• Confirm the SemverComp.parse() pattern matches the convention used in other test files (e.g., L1FeeVault_Version_Test, BaseFeeVault_Version_Test)

Notes

• All tests are skipped via vm.skip(true) in OptimismSuperchainERC20Beacon_TestInit pending re-integration of the beacon contract. This PR doesn't change that behavior.
• just pr passes locally (all 16/16 checks).

Link to Devin session: https://app.devin.ai/sessions/67da260877434a81a3340884b6bdff59
Requested by: @aliersh

[devin-ai-integration]

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 79.4%. Comparing base (85e4935) to head (e9ee660).

Additional details and impacted files

@@             Coverage Diff             @@
##           develop   #19446      +/-   ##
===========================================
+ Coverage     11.7%    79.4%   +67.7%     
===========================================
  Files          676      138     -538     
  Lines        71049     6699   -64350     
===========================================
- Hits          8322     5325    -2997     
+ Misses       62583     1374   -61209     
+ Partials       144        0     -144     

Flag	Coverage Δ
cannon-go-tests-64	?
contracts-bedrock-tests	79.4% <ø> (ø)
unit	?

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see 538 files with indirect coverage changes

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