improvement: honor allow_all_media_type_params? in content-type as well

Author: zachdaniel

lib/ash_json_api/request.ex

@@ -221,7 +221,8 @@ defmodule AshJsonApi.Request do
               true
 
             {:ok, "application", "vnd.api+json", params} ->
-              valid_header_params?(params)
+              Application.get_env(:ash_json_api, :allow_all_media_type_params?, false) ||
+                valid_header_params?(params)
 
             _ ->
               false