#### Is your feature request related to a problem? Please describe.
No.

#### Describe the solution you'd like
#4734 Changed the entire behavior of the params serializer, breaking using any custom functionality on the consumer side. Add a boolean switch to mimic pre 1.x behavior (default is false) and send the params directly to the encode function

#### Describe alternatives you've considered
Tried working with new solution; it did not pan out well and led to more bugs with our requests

test/typescript/axios.ts
onDownloadProgress: (progressEvent: AxiosProgressEvent) => {},
  maxContentLength: 2000,
  maxBodyLength: 2000,
  validateStatus: (status: number) => status >= 200 && status < 300,
  maxRedirects: 5,
  proxy: {
    host: '127.0.0.1',
    port: 9000
  },
  cancelToken: new axios.CancelToken((cancel: Canceler) => {})
};
const nullValidateStatusConfig: AxiosRequestConfig = {
  validateStatus: null
};
const undefinedValidateStatusConfig: AxiosRequestConfig = {
  validateStatus: undefined
};
const handleResponse = (response: AxiosResponse) => {
  console.log(response.data);
  console.log(response.status);
  console.log(response.statusText);
  console.log(response.headers);
  console.log(response.config);
};
const handleError = (error: AxiosError) => {
  if (error.response) {
    console.log(error.response.data);
    console.log(error.response.status);
    console.log(error.response.headers);
  } else {