txnprovider/shutter: follow up update for EIP-8037

[taratorio]

Summary

Addresses the TODO(yperbasis): revisit Shutter gas filtering for EIP-8037 in txnprovider/shutter/pool.go.

Why

The Shutter pool previously used txn.GetGasLimit() as a conservative proxy for both regular and state gas dimensions because it lacked access to the chain config needed to compute intrinsic gas. Two problems:

• Over-conservative: it deducted the full gas limit from both availableGas.Regular and availableGas.State, and rejected any txn whose gas limit exceeded either dimension — even when the actual intrinsic state gas was 0 (e.g., simple transfers).
• Misaligned with the base txpool's best(), which already filters by per-dimension intrinsic gas under EIP-8037.

What

• Pass *chain.Config to shutter.NewPool so it can resolve fork flags from block time.
• Replace the gasLimit-as-proxy filter with EIP-8037-aware per-dimension intrinsic gas filtering, matching txpool.best():
  • Compute per-dimension intrinsic gas via mdgas.IntrinsicGas with the right fork flags (EIP-3860 / 7623 / 7976 / 7981 / 8037).
  • Filter intrinsicRegularGas against availableGas.Regular and intrinsicGasResult.StateGas against availableGas.State independently.
  • Deduct only intrinsic gas from each dimension. Execution-time state gas remains enforced by applyTransaction in the block assembler.
• Add Warn logs at every skip branch (overflow, insufficient regular / state / blob gas) with txn hash, type, sender, plus the relevant intrinsic and available gas values for the failing dimension.
• New test TestPoolProvideTxnsFiltersByIntrinsicGasNotFullGasLimit — verified red against the previous code and green against the fix.

Test plan

• go test ./txnprovider/shutter/...
• make lint
• make erigon
• TDD red/green verified by temporarily restoring the old filter loop