### Describe the bug

Module http adapter is not beind exported, so I cannot force axios to use the http adapter instead of xhr

### To Reproduce

```js
const axios =  require('axios');
const url = 'https://catfact.ninja/fact';
axios.get(url, {
  adapter: require('axios/lib/adapters/http'),
}).then(console.log).catch(console.log);
```
or 
```js
const instance = axios.create({
  adapter: require('axios/lib/adapters/http'),
})
```
It works using axios@0.27.2




### Expected behavior

Use HTTP adapter

### Axios Version

1.1.3 and 1.2.0-alpha.1

### Adapter Version

HTTP

### Browser

_No response_

### Browser Version

_No response_

### Node.js Version

19.0.0

### OS

_No response_

### Additional Library Versions

_No response_

### Additional context/Screenshots

_No response_
lib/adapters/xhr.js
return new Promise(function dispatchXhrRequest(resolve, reject) {
    let requestData = config.data;
    const requestHeaders = AxiosHeaders.from(config.headers).normalize();
    const responseType = config.responseType;
    let onCanceled;
    function done() {
      if (config.cancelToken) {
        config.cancelToken.unsubscribe(onCanceled);
      }
      if (config.signal) {
        config.signal.removeEventListener('abort', onCanceled);
      }
    }
    if (utils.isFormData(requestData) && platform.isStandardBrowserEnv) {
      requestHeaders.setContentType(false); 
    }
    let request = new XMLHttpRequest();
    
    if (config.auth) {
      const username = config.auth.username || '';
      const password = config.auth.password ? unescape(encodeURIComponent(config.auth.password)) : '';
      requestHeaders.set('Authorization', 'Basic ' + btoa(username + ':' + password));
    }
    const fullPath = buildFullPath(config.baseURL, config.url);
    request.open(config.method.toUpperCase(), buildURL(fullPath, config.params, config.paramsSerializer), true);
    
    request.timeout = config.timeout;
    function onloadend() {