next.js

1caa5896 - Add flag to control app document preloading (#48115)

Add flag to control app document preloading (#48115) x-ref: [slack thread](https://vercel.slack.com/archives/C02EU7CEVB7/p1680910556362999?thread_ts=1680906129.293849&cid=C02EU7CEVB7)