Introduce an interpreter for BlockComponent

After input-output-hk/ouroboros-network#2534, we can define a single interpreter for `BlockComponent` and use that in both the VolatileDB and ImmutableDB.

https://github.com/input-output-hk/ouroboros-network/pull/2534#discussion_r485420704:
> Idea: introduce an interpreter that can also be used by the ImmutableDB. It would have its own error type that both DBs could wrap in their own error type. See how many arguments would be required.