Support snap sync for OP chains

[ImTei]

Description

Hi! This is Tei from Test in Prod.

This PR is a small fix for Geth’s snap sync for op chains.

• Geth reads account bytecodes with prefixed keys during the snap-sync. However, the bedrock genesis DB saves bytecodes with the legacy key without prefixes. This PR adds a fallback logic for the legacy keys to serve bytecodes for snap sync.
  • FYI, this fallback had been removed by the Geth team (https://github.com/ethereum/go-ethereum/pull/24276/files#diff-048b7cda1c653b08f9eea9ee81ac5937ea8326556bceffd1ca1a3059bc24dbfdR470) for optimization.
  • New nodes that are synced using snap-sync will have prefixed keys in their DB, so eventually we can follow the deprecation process.
• Geth starts snap sync only if the current chain head is at the genesis block. This PR allows snap sync from the bedrock genesis block.

Tests

This fix was tested manually. I think it can be tested automatically in Hive.

Additional context

A new feature to trigger snap sync of op-geth has been implemented in op-node.