Remove `TryInto` for `Raw` and remove `Raw` config types about viceroy HOT 2 OPEN

#[derive(Deserialize)]
struct TomlFastlyConfig {
    local_server: Option<RawLocalServerConfig>,
    ...
    ...
}

let local_server = local_server
            .map(TryInto::try_into)
            .transpose()?
            .unwrap_or_default();

#[derive(Deserialize)]
struct TomlFastlyConfig {
    local_server: Option<String>,
    ...
    ...
}