fix: don't start watching files in "run" mode (#2680)

Author: sheremet-va

packages/vitest/src/node/plugins/index.ts

@@ -172,6 +172,15 @@ export async function VitestPlugin(options: UserConfig = {}, ctx = new Vitest('t
 
         for (const name in envs)
           process.env[name] ??= envs[name]
+
+        // don't watch files in run mode
+        if (!options.watch) {
+          viteConfig.server.watch = {
+            persistent: false,
+            depth: 0,
+            ignored: ['**/*'],
+          }
+        }
       },
       async configureServer(server) {
         try {