Add remaining fuzzing tests and remove pseudo-random fuzzing

[cairoeth]

Fixes #4894 by removing unit tests that are already equivalently running with fuzzing via Foundry and adding remaining fuzzing unit tests. WIP.

PR Checklist

• [ ] Checkpoints
• [ ] CircularBuffer
• [ ] AccessControlEnumerable
• [ ] GovernorVotesQuorumFraction
• [x] GovernorCountingFractional
• [x] AuthorityUtils
• [x] CREATE2
• [x] ECDSA
• [x] Strings
• [ ] ERC20Votes
• [ ] ERC20Snapshot
• [ ] ERC721Votes

• [ ] Tests
• [ ] Documentation
• [ ] Changeset entry (run npx changeset add)

[changeset-bot[bot]]

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Latest commit: b607f30a236ec3fa448c88a2953dfed1cad4f644

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