Use testcontainers for Rust PostgreSQL tests

apps/admin-api/Cargo.toml

@@ -35,5 +35,6 @@ uuid.workspace = true
 
 [dev-dependencies]
 async-trait = "0.1"
+crank-test-support = { path = "../../crates/crank-test-support" }
 reqwest.workspace = true
 serial_test = "3"

apps/admin-api/src/app.rs

@@ -193,7 +193,6 @@ mod tests {
     use crank_schema::{Schema, SchemaKind};
     use serde_json::{Value, json};
     use serial_test::serial;
-    use sqlx::{Connection, Executor, PgConnection};
     use tokio::net::TcpListener;
 
     use crate::{
@@ -2229,26 +2228,8 @@ mod tests {
     }
 
     async fn test_registry() -> PostgresRegistry {
-        let database_url = env::var("TEST_DATABASE_URL")
-            .unwrap_or_else(|_| "postgres://crank:crank@127.0.0.1:15432/crank".to_owned());
-        let mut admin_connection = PgConnection::connect(&database_url).await.unwrap();
-        let schema = format!(
-            "test_admin_api_{}_{}",
-            std::process::id(),
-            SystemTime::now()
-                .duration_since(UNIX_EPOCH)
-                .unwrap()
-                .as_nanos()
-        );
-
-        admin_connection
-            .execute(sqlx::query(&format!("create schema {schema}")))
-            .await
-            .unwrap();
-        let registry =
-            PostgresRegistry::connect(&format!("{database_url}?options=-csearch_path%3D{schema}"))
-                .await
-                .unwrap();
+        let database_url = crank_test_support::postgres_schema_url("test_admin_api").await;
+        let registry = PostgresRegistry::connect(&database_url).await.unwrap();
         let password_hash = hash_password(TEST_AUTH_PASSWORD, TEST_PASSWORD_PEPPER).unwrap();
         let user_id = registry
             .upsert_bootstrap_user(TEST_AUTH_EMAIL, "Test Owner", &password_hash)