Add 'options' property to schema for choices in qualitative analysis select multiple questions

[jnm]

Description

Qualitative analysis questions already had an options property, but choices for select multiple questions did not. This modifies the schema to allow options for both. We'll use options to store a deletion marker instead of purging questions and choices from the database when they are deleted in the UI.

Notes

The options object is not currently validated by the back end's schema. However, I'd suggest using "options": {"deleted": true} as the deletion flag for both questions and choices. Full example:

{
  "advanced_features": {
    "qual": {
      "qual_survey": [
        {
          "uuid": "73fae086-1249-4f97-a7eb-e0d3456c0015",
          "type": "qual_select_multiple",
          "labels": {
            "_default": "this is a select multiple question label"
          },
          "choices": [
            {
              "uuid": "260488e0-0dc7-4faa-85fb-bc1806c0d74e",
              "labels": {
                "_default": "this is a select multiple choice label 1"
              }
            },
            {
              "uuid": "953a8b6d-4b63-4bb1-be05-d25a2dbbd1d0",
              "labels": {
                "_default": "this is a select multiple deleted choice label"
              },
              "options": {
                "deleted": true
              }
            }
          ],
          "scope": "by_question#survey",
          "qpath": "source_question_path"
        },
        {
          "uuid": "507dc90d-2b66-4433-aa03-7a5bb28a1580",
          "type": "qual_text",
          "labels": {
            "_default": "this is a deleted text question label"
          },
          "scope": "by_question#survey",
          "qpath": "source_question_path",
          "options": {
            "deleted": true
          }
        }
      ]
    }
  }
}

Related issues

Fixes #4625