`eth_getblockByNumber` possible discrepancy on `accessList`

[LesnyRumcajs]

Summary

In case of empty accessList Lotus returns [] and Forest null.

❯ curl -s -X POST http://localhost:2345/rpc/v2 \
         -H 'Content-Type: application/json' \
         -d '[{
       "jsonrpc": "2.0",
       "id": "1",
       "method": "eth_getBlockByNumber",
       "params": ["latest" , true]
     }]' | jq

This needs investigating.

Completion Criteria

• Check what's the correct behavior - source of truth is real Ethereum impls (check at least two, default to reth).
• if Forest is in the wrong, fix, otherwise report to FilOz
• ensure regression test catch this - this is a discrepancy between the nodes that should've been caught ahead of time.

Additional Links & Resources

[LesnyRumcajs]

Some other methods might be affected as well, e.g., eth_accounts