eager parsing of ip addr (#6446)

## Problem

Parsing the IP address at check time is a little wasteful. 

## Summary of changes

Parse the IP when we get it from cplane. Adding a `None` variant to
still allow malformed patterns

proxy/src/console/provider/mock.rs

@@ -4,14 +4,13 @@ use super::{
     errors::{ApiError, GetAuthInfoError, WakeComputeError},
     AuthInfo, AuthSecret, CachedNodeInfo, NodeInfo,
 };
-use crate::cache::Cached;
 use crate::console::provider::{CachedAllowedIps, CachedRoleSecret};
 use crate::context::RequestMonitoring;
 use crate::{auth::backend::ComputeUserInfo, compute, error::io_error, scram, url::ApiUrl};
+use crate::{auth::IpPattern, cache::Cached};
 use async_trait::async_trait;
 use futures::TryFutureExt;
-use smol_str::SmolStr;
-use std::sync::Arc;
+use std::{str::FromStr, sync::Arc};
 use thiserror::Error;
 use tokio_postgres::{config::SslMode, Client};
 use tracing::{error, info, info_span, warn, Instrument};
@@ -88,7 +87,9 @@ impl Api {
             {
                 Some(s) => {
                     info!("got allowed_ips: {s}");
-                    s.split(',').map(String::from).collect()
+                    s.split(',')
+                        .map(|s| IpPattern::from_str(s).unwrap())
+                        .collect()
                 }
                 None => vec![],
             };
@@ -100,7 +101,7 @@ impl Api {
         .await?;
         Ok(AuthInfo {
             secret,
-            allowed_ips: allowed_ips.iter().map(SmolStr::from).collect(),
+            allowed_ips,
             project_id: None,
         })
     }

proxy/src/console/provider/neon.rs

@@ -14,7 +14,6 @@ use crate::{
 };
 use async_trait::async_trait;
 use futures::TryFutureExt;
-use itertools::Itertools;
 use smol_str::SmolStr;
 use std::sync::Arc;
 use tokio::time::Instant;
@@ -94,12 +93,7 @@ impl Api {
                     .ok_or(GetAuthInfoError::BadSecret)?;
                 Some(secret)
             };
-            let allowed_ips = body
-                .allowed_ips
-                .into_iter()
-                .flatten()
-                .map(SmolStr::from)
-                .collect_vec();
+            let allowed_ips = body.allowed_ips.unwrap_or_default();
             ALLOWED_IPS_NUMBER.observe(allowed_ips.len() as f64);
             Ok(AuthInfo {
                 secret,