DELETE with a body

[twhitbeck]

This has been raised before in #93 but it wasn't addressed.
We're trying to delete a PIT which requires putting a body on a DELETE request (see https://www.elastic.co/guide/en/elasticsearch/reference/8.11/paginate-search-results.html#:~:text=When%20you%E2%80%99re%20finished%2C%20you%20should%20delete%20your%20PIT)

Any chance we can get support for adding a body to a DELETE?