datadog_synthetics_test: There is no way to add form data when choosing body_type multipart/form

[hajali-amine]

What resources or data sources are affected?

datadog_synthetics_test

Feature Request

Allow us to add form data, for example:

request_definition {
  url = "example.com"
  method = "POST"
  body_type = "multipart/form-data"
  body_form_data {
    type = "file"
    value = "<FILENAME FROM request_file attribute>"
  }
  body_form_data {
    type = "text"
    value = "blahblah"
  }
....
}

References

No response