POST body missing, invalid Content-Type, or JSON object has no keys.

Using Keystone nextjs pages router monorepo with apollo server instead of graphql-yoga, this happens when I try to upload an image from the image field of keystone.
```
POST body missing, invalid Content-Type, or JSON object has no keys.
```
if I use graphql-yoga instead I get a duplex issue which looks like this:
```
RequestInit: duplex option is required when sending a body
```

and this happens when I have bodyParser as false but if I remove bodyParser I get no steam or arrayBuffer in the File response so I cannot upload the image properly.

So any thoughts regarding that would be much appreciated! Thanks in advance

Should be uploaded without errors

"@apollo/server": "^4.9.5",
"@as-integrations/next": "^3.0.0",
"graphql-yoga": "^5.1.1",

Node version: 18
Nextjs: 14.1.0

Start by reproducing the Keystone image upload with the Next.js pages router, Node 18, Next.js 14.1.0, and the reported Apollo Server or graphql-yoga integration. Compare behavior with bodyParser disabled versus enabled and verify that the upload completes without the missing-body, invalid Content-Type, duplex, or missing stream/arrayBuffer errors.

Written by the indexing model from the issue text.