graphql 16 not supported

### Which packages are impacted by your issue?

@graphql-codegen/cli

### Describe the bug

Note - this is not a duplicate of #6937, this is to point out that issue is not actually complete.

The example in the docs does not work with graphql 16: https://the-guild.dev/graphql/codegen/docs/custom-codegen/using-visitor

The example *does* work if I downgrade to graphql 15.

Specifically this plugin example:
```ts
const { getCachedDocumentNodeFromSchema } = require('@graphql-codegen/plugin-helpers')
const { visit } = require('graphql')

module.exports = {
plugin(schema, documents, config) {
const astNode = getCachedDocumentNodeFromSchema(schema) // Transforms the GraphQLSchema into ASTNode
const visitor = {
FieldDefinition(node) {
// This function triggered per each field
},
ObjectTypeDefinition(node) {
// This function triggered per each type
}
}

const result = visit(astNode, { leave: visitor })

return result.definitions.join('\n')
}
}
```

Running this results in `visitFn.call is not a function`.

This is outlined in #6937, which is closed, but the issue persists as other recent comments on that issue indicate.

### Your Example Website or App

https://codesandbox.io/p/sandbox/headless-cloud-6z6r45

### Steps to Reproduce the Bug or Issue

1. Go to linked example
2. Run `npm run codegen` in the terminal
3. Observe output

### Expected behavior

Visitor function should not error.

### Screenshots or Videos

### Platform

- OS: multiple, n/a
- NodeJS: multiple, n/a
- `graphql` version: 16.6
- `@graphql-codegen/*` version(s): all latest, see sandbox

### Codegen Config File

See sandbox, copied from docs

### Additional context

_No response_