input: Write a python function to send a POST request to a given URL with provided form data and return the response status code.
  assert send_post_request('https://example.com', {'field1': 'value1', 'field2': 'value2', 'field3': 'value3', 'field4': 'value4'}) == 200
  assert send_post_request('https://example.com', {'field1': 'value1'}) == 200
  assert send_post_request('https://example.com', {'field1': 'value1', 'field2': 'value2'}) in [200, 400, 404]
output: import requests
  
  def send_post_request(url, form_data):
      response = requests.post(url, data=form_data)
      return response.status_code