Relay Support in Rust Compiler (#33240)

## Feature

Implements feature requested in #30805. 

A few people including myself have been looking to use Relay with Next.JS and want to use the new Rust Compiler. This is my stab at an implementation. 

### How it works?
Finds all  `graphql` tagged template experssions and replaces them with `require`s to the file generated by Relay.

### Where I need help
- I've only worked with Rust a handful of times so I would appreciate any feedback on my use of language features.
- Is there any performance overhead to many duplicate usages of `require`? I imagine there's a cache in place but I want to be sure.
- I've added some unit tests & integration tests but I might be missing some use cases. Feel free to comment some use cases I'm not thinking about.

- [x] Related issues linked using `fixes #number`
- [x] Integration tests added
- [ ] Documentation added
  - I haven't added any docs since this is an experimental API.

## Documentation / Examples

You're expected to be running the Relay Compiler along side Next.JS when you're developing. This is pretty standard. I wouldn't expect people to have any problem with this.

### Usage
In your `next.config.js`
```js
module.exports = {
  experimental: {
    relay: {
      language: 'typescript', // or 'javascript`
      artifactDirectory: 'path/to/you/artifact/directory' // you can leave this undefined if you did not specify one in the `relay.json`
    }
  }
}
```


Co-authored-by: Tim Neutkens <6324199+timneutkens@users.noreply.github.com>

docs/advanced-features/compiler.md

@@ -94,6 +94,19 @@ const customJestConfig = {
 module.exports = createJestConfig(customJestConfig)
 ```
 
+### Relay
+
+To enable [Relay](https://relay.dev/) support:
+
+```js
+// next.config.js
+module.exports = {
+  experimental: {
+    relay: true,
+  },
+}
+```
+
 ### Remove React Properties
 
 Allows to remove JSX properties. This is often used for testing. Similar to `babel-plugin-react-remove-properties`.

package.json

@@ -59,6 +59,7 @@
     "@types/http-proxy": "1.17.3",
     "@types/jest": "24.0.13",
     "@types/node": "13.11.0",
+    "@types/relay-runtime": "13.0.0",
     "@types/selenium-webdriver": "4.0.15",
     "@types/sharp": "0.29.3",
     "@types/string-hash": "1.1.1",
@@ -145,6 +146,8 @@
     "react-dom": "17.0.2",
     "react-dom-18": "npm:react-dom@18.0.0-rc.0",
     "react-ssr-prepass": "1.0.8",
+    "relay-compiler": "13.0.1",
+    "relay-runtime": "13.0.1",
     "release": "6.3.0",
     "request-promise-core": "1.1.2",
     "resolve-from": "5.0.0",