Implement prestate loading from superchain-registry standard-prestates

[maurelian]

Description

Currently the OPCMV200 template hardcodes prestates into the config.toml file. This is error prone
especially when multiple copies of the runbook are needed.

Proposed Changes

1. Update the config.toml format to specify the key to use for look up in standard-prestates:

absolutePrestates = [
    {absolutePrestate = "prestates.1.5.0-rc.4", chainId = 10},
    {absolutePrestate = "prestates.1.5.0-rc.4", chainId = 1868},
    {absolutePrestate = "prestates.1.5.0-rc.4", chainId = 57073}
]

2. Update the prestate reading logic to look up the prestate in standard-prestates.toml.
3. Validation should sanity check that the prestate is 32 bytes long, beginning with 0x03.