Generic processing pipeline

[apfitzge]

Problem

• To allow new transaction type, we need to switch types (or make generic) in our processing pipeline

Summary of Changes

• Make (as much as reasonably possible at this time) the processing pipeline generic

Fixes #

[apfitzge]

From here, block-verification (replay) and block-production (banking) can be made generic independently.

[jstarry]

Is it necessary to have SVMTransactionAdapter? Can't we add those methods to SVMTransaction instead?

[apfitzge]

Is it necessary to have SVMTransactionAdapter? Can't we add those methods to SVMTransaction instead?

SVMTransaction is meant to be stuff necessary for svm. converting into our legacy formats for our internal/plugin interfaces elsewhere isn't necessary for that.

The goal is for SVMTransactionAdapter to go away eventually, as our interfaces become better. It just needs to exist until those change, but changing the interfaces involves breaking geyser plugins - so it will not happen immediately.