build(vitest): try reverting to vitest@1 behaviors

Author: serhalp

vitest.config.ts

@@ -21,11 +21,19 @@ export default defineConfig({
     snapshotFormat: {
       escapeString: true,
     },
+    // Pin to vitest@1 behavior: https://vitest.dev/guide/migration.html#default-pool-is-forks.
+    // TODO(serhalp) Remove this and fix hanging `next-app-without-config` fixture on Windows.
+    pool: 'threads',
     poolOptions: {
       threads: {
         singleThread: true,
       },
     },
+    // Pin to vitest@1 behavior: https://vitest.dev/guide/migration.html#hooks-are-running-in-a-stack.
+    // TODO(serhalp) Remove this and fix hanging `next-app-without-config` fixture on Windows.
+    sequence: {
+      hooks: 'parallel',
+    },
     coverage: {
       provider: 'v8',
       reporter: ['text', 'lcov'],