### 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/specs/instance.spec.js
it('should have interceptors on the instance', function (done) {
    axios.interceptors.request.use(function (config) {
      config.foo = true;
      return config;
    });
    const instance = axios.create();
    instance.interceptors.request.use(function (config) {
      config.bar = true;
      return config;
    });
    let response;
    instance.get('/foo').then(function (res) {
      response = res;
    });
    getAjaxRequest().then(function (request) {
      request.respondWith({
        status: 200
      });
      setTimeout(function () {
        expect(response.config.foo).toEqual(undefined);
        expect(response.config.bar).toEqual(true);
        done();
      }, 100);
    });
  });
  it('should have getUri on the instance', function() {
    const instance = axios.create({
      baseURL: 'https://api.example.com'
    });
    const options = {