Enable Test Validator Account Cloning

[bonedaddy]

Overview

Solves #533 by allowing one to specify a list of account addresses to clone from a specified cluster. As is this is a breaking change to the configuration file format. However the change allows for future additions to tweaking test validator behaviour without introducing breaking changes.

Example of an anchor config file using the changes included in this PR:

[test.genesis]
url = "https://api.mainnet-beta.solana.com"
[[test.genesis.programs]]
address = "9KEPoZmtHUrBbhWN1v1KWLMkkvwY6WLtAVUCPRtRjP4z"
program = "./deps/raydium/stake_program_v5.so"
[[test.genesis.accounts]]
address = "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v"
name = "USDC-TOKEN-MINT"

[armaniferrante]

This was coincidentally addressed by #834. Closing.