Update contract sizes benchmark

[github-actions]

This PR updates the contract size benchmarks after a recent merge to main.

Summary by CodeRabbit

• Chores
  • Updated contract size benchmarks with metrics for new test contracts.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: cc405753-8e00-4225-a5c6-a69ebdca7ef9

📥 Commits

Reviewing files that changed from the base of the PR and between 5452a72 and 19bfe69.

📒 Files selected for processing (1)

• benches/contract_sizes.json

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Walkthrough

Added benchmark contract size measurements to benches/contract_sizes.json for three new OpenZeppelin contracts: ERC20FlashMintConfiguredMock, ERC20FlashMintMock, and ERC3156FlashBorrowerMock. The entries include compiled bytecode and contract class sizes.

Changes

Cohort / File(s)	Summary
Benchmark Data benches/contract_sizes.json	Added contract size metrics for three flash mint-related contracts under both bytecode and contract_class mappings, documenting compiled sizes in felts and bytes respectively.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

Possibly related PRs

• Update contract sizes benchmark #1644: Updates to benches/contract_sizes.json with contract size benchmarks for similar contracts.

Suggested reviewers

• ericnordelo
• immrsd
• bidzyyys

Poem

🐰 Three contracts now measured and weighed,
Flash mint magic in metrics displayed,
Bytecode and class sizes all set,
The benchmark collection grows yet,
OpenZeppelin's benchmarks cascade! ✨

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title 'Update contract sizes benchmark' directly and accurately reflects the main change in the pull request, which updates contract size benchmark entries in the benches/contract_sizes.json file.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch update/contract-sizes-23796841385

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