feat: Increased the timeout of waiting for db in tests (#3007)

I don't know about other people's setup, but for me it is very flaky
with just 3s

zk_toolbox/crates/zk_supervisor/src/commands/test/db.rs

@@ -26,7 +26,7 @@ pub async fn reset_test_databases(
     for dal in dals {
         let mut url = dal.url.clone();
         url.set_path("");
-        wait_for_db(&url, 3).await?;
+        wait_for_db(&url, 20).await?;
         database::reset::reset_database(shell, link_to_code, dal.clone()).await?;
     }