[Tracking] Core Transaction Type

[apfitzge]

Problem

Tracking issue to rework the transaction type used in core more efficient.
A major bottleneck in the current TPU pipeline is deserialization (and dropping) of transactions in BankingStage.
A cause of the poor performance is our structure design and use of the generalized serde/bincode which force us to take ownership of our data.

Proposed Solution

Create and use a new transaction structure inside core.

Tasks:

• [Tracking] SVM: Generic over Transaction Type #2108
• [Tracking] TransactionView #2255
• RuntimeTransaction (wrapping TransactionView with additional meta)
• Scheduler Updates
• Unify Parsing with SigVerify