Error messages set to `vfile` by Remark plugins are not reported.

### Have you read the Contributing Guidelines on issues?

- [X] I have read the [Contributing Guidelines on issues](https://github.com/facebook/docusaurus/blob/main/CONTRIBUTING.md#issues).

### Prerequisites

- [X] I'm using the latest version of Docusaurus.
- [X] I have tried the `npm run clear` or `yarn clear` command.
- [X] I have tried `rm -rf node_modules yarn.lock package-lock.json` and re-installing packages.
- [X] I have tried creating a repro with https://new.docusaurus.io.
- [X] I have read the console error message carefully (if applicable).

### Description

Remark plugins need to issue warnings and create errors when processing mdx files. They can do so using the [vfile.message](https://github.com/vfile/vfile#vfilemessagereason-options) mechanism already.

The messages can be reported with the [vfile-reporter](https://github.com/vfile/vfile-reporter) utility. The `reporter` presents the messages in a convenient way, grouping messages by file and linking each error to the reported line and column number in the mdx document.

However, **when Docusaurus applies a Remark plugin to a mdx document, it doesn't report the warnings and errors**.

I can kind of get around it by writing a new Remark plugin, and putting it at the end of the pipeline:

```js
import { reporter } from "vfile-reporter";
export default function reporter() {
return (_, vfile) => {
console.error(reporter(vfile));
};
}
```

but this is not very neat as the plugins are executed multiple times during `docusaurus start` and it relentlessly spams the terminal. To experience this, uncomment the `[require("./plugins/plugin-reporting.js"), {}],` line (line 51, docusaurus.config.js) in the bug repro.

### Reproducible demo

https://codesandbox.io/p/devbox/priceless-meadow-dq4n4h?file=%2Fplugins%2Fplugin-erroring.js%3A3%2C59

### Steps to reproduce

In any remark plugin, add a `vfile.message("message")` line. It should show up but doesn't.

Check the codesandbox repro for demo.

### Expected behavior

I expect the messages that the Remark plugins set on vfiles are reported by Docusaurus either by default or as a simple config toggle.

### Actual behavior

The messages are never shown.

### Your environment

- Public source code: https://codesandbox.io/p/devbox/priceless-meadow-dq4n4h?file=%2Fplugins%2Fplugin-erroring.js%3A3%2C59
- Public site URL:
- Docusaurus version used: 3.1.1
- Environment name and version (e.g. Chrome 89, Node.js 16.4):
- Operating system and version (e.g. Ubuntu 20.04.2 LTS):

### Self-service

- [X] I'd be willing to fix this bug myself.