Fix failure when replaying block number 21041283

[Wodann]

Block number 21041283 is failing to replay correctly (ci failure, Repro branch).

Potentially related: https://github.com/erigontech/erigon/issues/12242

Analysis

One transaction in the block reverts instead of succeeding, with this error message:

EigenPod.getParentBlockRoot: invalid block root returned

It might be that we're not correctly setting the parent_beacon_block_root (EIP-4788)

Definition of done Fix the bug such that the test in the repro branch succeeds.