next.js

d483dfac - [metadata] add option of configuring ua of async metadata (#74594)

[metadata] add option of configuring ua of async metadata (#74594) ### What Introduce an experimental config `experimental.htmlLimitedBots` (type `Regex`) which can used for controlling the metadata streaming behavior for different bots, if the bots user agent is matching the regex, it will serve blocking metadata forcedly. This gives users some control to opt-out streaming metadata for some clients or bots which cannot handle it. Output another manifest `response-config-manfiest.json` containing the customized UA, which is potentially used for the platform serving Next.js to control the returned response for certain UA. But it's mostly for PPR case which we'll tackle later. Closes NDX-635 Closes NDX-599