feat(statetest-types): add slot_number support (EIP-7843)

[rakita]

Summary

• Add slot_number field to BlockHeader and Env structs to support EIP-7843
• Map slot_number to slot_num in BlockEnv for both blockchain and state tests
• Temporarily disable serde strict parsing in Test struct to allow unknown fields

Test plan

• Run state tests with new test vectors containing slot_number field
• Verify backward compatibility with existing test fixtures

[codspeed-hq]

Merging this PR will improve performance by 3.01%

⚡ 1 improved benchmark
✅ 172 untouched benchmarks

Performance Changes

	Benchmark	BASE	HEAD	Efficiency
⚡	ecrecover precompile	204.2 µs	198.2 µs	+3.01%

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_{Comparing check-reports (1cd564f) with main (cb06ba8)}