fix(build): make output warning message clearer (#12924)

Author: btea

packages/vite/src/node/build.ts

@@ -910,6 +910,11 @@ export function onRollupWarning(
     warn(warning)
   }
 
+  const tty = process.stdout.isTTY && !process.env.CI
+  if (tty) {
+    process.stdout.clearLine(0)
+    process.stdout.cursorTo(0)
+  }
   const userOnWarn = config.build.rollupOptions?.onwarn
   if (userOnWarn) {
     userOnWarn(warning, viteWarn)