use a less wrong scheam for save-draft (#402)

Co-authored-by: burnettk <burnettk@users.noreply.github.com>

spiffworkflow-backend/src/spiffworkflow_backend/api.yml

@@ -1949,7 +1949,7 @@ paths:
         content:
           application/json:
             schema:
-              $ref: "#/components/schemas/ProcessGroup"
+              $ref: "#/components/schemas/AwesomeUnspecifiedPayload"
       responses:
         "200":
           description: One task
@@ -3160,6 +3160,13 @@ components:
         report_metadata:
           nullable: false
           $ref: "#/components/schemas/ReportMetadata"
+    # if we pass a payload and give it a field of the wrong type (say we pass a field with value null and it wants a string)
+    # it will fail validation and not pass the request to the controller. that is generally not desirable
+    # until we take a closer look at the schemas in here.
+    AwesomeUnspecifiedPayload:
+      properties:
+        anythingyouwant:
+          type: string
     ReportMetadata:
       properties:
         columns: