Finish separation of public and private logs in our TS codebase

[benesjan]

AztecNode now has getPrivateLogsByTags and getPublicLogsByTags in its interface instead of the singular getLogsByTags. The logs are however still grouped in a single map in LogStore and TxScopedL2Log return type supports both private and public logs. Seems to make sense to go all the way and separate the 2.