### Describe the bug

Relying on axios automatic serialization to create a form-data results in this error. The following lines are responsible of this error : https://github.com/axios/axios/blob/release/dist/node/axios.cjs#L2654 (mainly the `getLengthSync` function)

According to [form-data themselves](https://github.com/form-data/form-data), using `getLengthSync` is [not recommended](https://github.com/form-data/form-data/blob/master/Readme.md?plain=1#L350).

### To Reproduce

- Create a file buffer with `fs.createReadStream`
- Set HTTP header `Content-Type` to `multipart/form-data` to make use of [automatic serialization](https://github.com/axios/axios#-automatic-serialization-to-formdata)
- Get the form-data `Cannot calculate proper length in synchronous way.` error

### Code snippet

```js
const axios = require("axios");
const fs = require("node:fs");
const fileBuffer = fs.createReadStream("./file.ext");

axios.post('https://httpbin.org/post', {file: fileBuffer}, {
  headers: {
    'Content-Type': 'multipart/form-data'
  }
})
.then(({data}) => console.log(data))
.catch((err) => console.error(err));
```


### Expected behavior

The content length should be calculated without throwing any error.

### Axios Version

1.3.0

### Adapter Version

_No response_

### Browser

_No response_

### Browser Version

_No response_

### Node.js Version

16.19.0

### OS

_No response_

### Additional Library Versions

_No response_

### Additional context/Screenshots

_No response_
lib/adapters/http.js
let proxy = configProxy;
  if (!proxy && proxy !== false) {
    const proxyUrl = getProxyForUrl(location);
    if (proxyUrl) {
      proxy = new URL(proxyUrl);
    }
  }
  if (proxy) {
    
    if (proxy.username) {
      proxy.auth = (proxy.username || '') + ':' + (proxy.password || '');
    }
    if (proxy.auth) {
      
      if (proxy.auth.username || proxy.auth.password) {
        proxy.auth = (proxy.auth.username || '') + ':' + (proxy.auth.password || '');
      }
      const base64 = Buffer
        .from(proxy.auth, 'utf8')
        .toString('base64');
      options.headers['Proxy-Authorization'] = 'Basic ' + base64;
    }
    options.headers.host = options.hostname + (options.port ? ':' + options.port : '');