🚀 Feature

Add a new public prune_rocksdb_state<S, T> method, which takes in a rocksdb store and key type, as well as a range.

When called, it will queue a new type of SequentialOperation, which prunes the respective data.

As motivating usecase which should be tested in a unit test, a user should be able to prune all Authority related information older than 100 rounds (Signatures, BatchCertificates, Transmissions) while keeping Transactions