`getCurlCommand` fails when content type is `multipart/form-data` and/or `null`

### Environment SaaS (https://sentry.io/) ### Steps to Reproduce N/A - this is observed from Sentry issues e.g. https://sentry.sentry.io/issues/5284365861/events/fe5fc8fc7e334456a5ebee74f8fadb5e/ ### Expected Result It should render the data, though it might be tricky because it may contain file data e.g. from `<input type="file" />`. ### Actual Result It does not render the data ### Product Area Unknown ### Link https://sentry.sentry.io/issues/5284365861/events/fe5fc8fc7e334456a5ebee74f8fadb5e/?project=11276&referrer=previous-event&statsPeriod=30d&stream_index=0&utc=true ### DSN _No response_ ### Version _No response_