[Canvas] Move workpad api routes to New Platform (#51116)

* Move workpad api routes to New Platform

* Cleanup

* Clean up/Pr Feedback

* Adding missing dependency to tests

* Fix typecheck

* Loosen workpad schema restrictions

x-pack/legacy/plugins/canvas/__tests__/fixtures/workpads.ts

@@ -192,3 +192,16 @@ export const elements: CanvasElement[] = [
   { ...BaseElement, expression: 'filters | demodata | pointseries | pie | render' },
   { ...BaseElement, expression: 'image | render' },
 ];
+
+export const workpadWithGroupAsElement: CanvasWorkpad = {
+  ...BaseWorkpad,
+  pages: [
+    {
+      ...BasePage,
+      elements: [
+        { ...BaseElement, expression: 'image | render' },
+        { ...BaseElement, id: 'group-1234' },
+      ],
+    },
+  ],
+};

x-pack/legacy/plugins/canvas/public/lib/workpad_service.js

@@ -29,6 +29,7 @@ export function get(workpadId) {
   });
 }
 
+// TODO: I think this function is never used.  Look into and remove the corresponding route as well
 export function update(id, workpad) {
   return fetch.put(`${apiPath}/${id}`, workpad);
 }

x-pack/legacy/plugins/canvas/server/routes/index.ts

@@ -4,7 +4,6 @@
  * you may not use this file except in compliance with the Elastic License.
  */
 
-import { workpad } from './workpad';
 import { esFields } from './es_fields';
 import { customElements } from './custom_elements';
 import { shareableWorkpads } from './shareables';
@@ -13,6 +12,5 @@ import { CoreSetup } from '../shim';
 export function routes(setup: CoreSetup): void {
   customElements(setup.http.route, setup.elasticsearch);
   esFields(setup.http.route, setup.elasticsearch);
-  workpad(setup.http.route, setup.elasticsearch);
   shareableWorkpads(setup.http.route);
 }