Please support parity_listStorageKeys

[ytrezq]

Rationale

This api still OpenEthereum only, allows to list all storage/blockchain on past blocks and is required to build a token rich list on past blocks as well required by many security analysis tools.

Implementation

No idea on how to implement it though it looks like https://github.com/ledgerwatch/erigon failed to find a way to implement it without breaking database compatibility and thus is unwilling to implement it. Please notice OpenEthereum required the database to be fatdb enabled in addition to tracing enabled (full archive node instead of just archive node).