Tests don't need to call add-to-classpath! [ci drivers]

src/metabase/plugins/initialize.clj

@@ -20,7 +20,8 @@
           (lazy-loaded-driver/register-lazy-loaded-driver! (assoc info :driver driver))))
       ;; if *any* of the drivers is not lazy-load, initialize it now
       (when (some false? (map :lazy-load drivers))
-        (add-to-classpath!)
+        (when add-to-classpath!
+          (add-to-classpath!))
         (init-steps/do-init-steps! init-steps)))
     ;; record this plugin as initialized and find any plugins ready to be initialized because depended on this one !
     ;;

src/metabase/plugins/lazy_loaded_driver.clj

@@ -47,7 +47,8 @@
 (defn- make-initialize! [driver add-to-classpath! init-steps]
   (fn [_]
     ;; First things first: add the driver to the classpath!
-    (add-to-classpath!)
+    (when add-to-classpath!
+      (add-to-classpath!))
     ;; remove *this* implementation of `initialize!`, because as you will see below, we want to give
     ;; lazy-load drivers the option to implement `initialize!` and do other things, which means we need to
     ;; manually call it. When we do so we don't want to get stuck in an infinite loop of calls back to this