### Describe the bug

libraries like axios-mock-adapter define an adapter but in same cases need to access to original adapter.

It was working correctly before as the adapter was always a function.
Now it can be an array of string

Only the method getAdapter() in adapters/adapter.js can allow access to original adapters (xhr and http)
But this method is not exported a all at top level.

Can you export it ? 


### To Reproduce

Try to use axios-mock-adapter plugin with onNoMatch option

### Code snippet

_No response_

### Expected behavior

_No response_

### Axios Version

1.2.1 and upper

### Adapter Version

_No response_

### Browser

_No response_

### Browser Version

_No response_

### Node.js Version

_No response_

### OS

_No response_

### Additional Library Versions

_No response_

### Additional context/Screenshots

_No response_
test/module/typings/esm/index.ts
instance1.get('/user', { params: { id: 12345 } })
    .then(handleResponse)
    .catch(handleError);
instance1.post('/user', { foo: 'bar' })
    .then(handleResponse)
    .catch(handleError);
instance1.post('/user', { foo: 'bar' }, { headers: { 'X-FOO': 'bar' } })
    .then(handleResponse)
    .catch(handleError);
axios.defaults.headers['X-FOO'];
axios.defaults.baseURL = 'https://api.example.com/';
axios.defaults.headers.common['Accept'] = 'application/json';
axios.defaults.headers.post['X-FOO'] = 'bar';
axios.defaults.timeout = 2500;
instance1.defaults.baseURL = 'https://api.example.com/';
instance1.defaults.headers.common['Accept'] = 'application/json';
instance1.defaults.headers.post['X-FOO'] = 'bar';
instance1.defaults.timeout = 2500;
axios.create({ headers: { foo: 'bar' } });
axios.create({ headers: { common: { foo: 'bar' } } });
axios.create({
  headers: {
    'Content-Type': 'application/json',
  },
  formSerializer: {
    indexes: null,
  },
  paramsSerializer: {
    indexes: null,
  },