Include support for @urql/exchange-graphcache 8 and 9 versions

### Which packages are impacted by your issue?

@graphql-codegen/typescript-urql-graphcache

### Describe the bug

I have to write this out every time to avoid duplicating dependencies. The types themselves are compatible between these versions.
```json
"overrides": {
"@graphql-codegen/typescript-urql-graphcache": {
"@urql/exchange-graphcache": "^9"
}
}
```

### Your Example Website or App

don't have

### Steps to Reproduce the Bug or Issue

1. npm install @urql/exchange-graphcache

### Expected behavior

Installed dependency

### Screenshots or Videos

_No response_

### Platform

- OS: Linux
- NodeJS: 25.7.0
- `graphql` version: 16.13.1
- `@graphql-codegen/typescript-urql-graphcache`: 4.0.1

### Codegen Config File

_No response_

### Additional context

_No response_