bring async-effect-after-await test from defer-effects-in-pending-boundary branch

Author: Rich-Harris

packages/svelte/tests/runtime-runes/samples/async-effect-after-await/Child.svelte

@@ -1,7 +1,11 @@
 <script>
+	$effect(() => {
+		console.log('before');
+	});
+
 	await 1;
 
 	$effect(() => {
-		console.log('hello');
+		console.log('after');
 	});
 </script>

packages/svelte/tests/runtime-runes/samples/async-effect-after-await/_config.js

@@ -3,7 +3,8 @@ import { test } from '../../test';
 
 export default test({
 	async test({ assert, logs }) {
+		assert.deepEqual(logs, []);
 		await tick();
-		assert.deepEqual(logs, ['hello']);
+		assert.deepEqual(logs, ['before', 'after']);
 	}
 });