[CLOUD] Instant deployment (elastic#201688)

## Summary

We are having the same issue as here
elastic#197667 for instant deployment. We
need to allow the solution_type `search`.


### Checklist

- [x] [Unit or functional
tests](https://www.elastic.co/guide/en/kibana/master/development-tests.html)
were updated or added to match the most common scenarios

x-pack/plugins/spaces/server/routes/api/internal/set_solution_space.test.ts

@@ -129,6 +129,60 @@ describe('PUT /internal/spaces/space/{id}/solution', () => {
     });
   });
 
+  it('should update the solution_type when it is search', async () => {
+    const payload = {
+      solution_type: 'search',
+    };
+
+    const { routeHandler, savedObjectsRepositoryMock } = await setup();
+
+    const request = httpServerMock.createKibanaRequest({
+      params: {
+        id: 'a-space',
+      },
+      body: payload,
+      method: 'post',
+    });
+
+    const response = await routeHandler(mockRouteContext, request, kibanaResponseFactory);
+
+    const { status } = response;
+
+    expect(status).toEqual(200);
+    expect(savedObjectsRepositoryMock.update).toHaveBeenCalledTimes(1);
+    expect(savedObjectsRepositoryMock.update).toHaveBeenCalledWith('space', 'a-space', {
+      solution: 'es',
+      name: 'a space',
+      color: undefined,
+      description: undefined,
+      disabledFeatures: [],
+      imageUrl: undefined,
+      initials: undefined,
+    });
+  });
+
+  it('should failed when the solution_type is not the expected one', async () => {
+    const payload = {
+      solution_type: 'searchXoXo',
+    };
+
+    const { routeHandler } = await setup();
+
+    const request = httpServerMock.createKibanaRequest({
+      params: {
+        id: 'a-space',
+      },
+      body: payload,
+      method: 'post',
+    });
+
+    const response = await routeHandler(mockRouteContext, request, kibanaResponseFactory);
+
+    const { status } = response;
+
+    expect(status).toEqual(500);
+  });
+
   it('should not allow a new space to be created', async () => {
     const payload = {
       solution: 'oblt',

x-pack/plugins/spaces/server/routes/api/internal/set_solution_space.ts

@@ -21,6 +21,7 @@ const spaceSolutionSchema = schema.oneOf([
       schema.literal('security'),
       schema.literal('observability'),
       schema.literal('elasticsearch'),
+      schema.literal('search'),
     ]),
   }),
 ]);

x-pack/test/api_integration/apis/spaces/set_solution_space.ts

@@ -139,7 +139,7 @@ export default function ({ getService }: FtrProviderContext) {
         .expect(400);
 
       expect(body.message).to.eql(
-        '[request body]: types that failed validation:\n- [request body.0.solution]: expected at least one defined value but got [undefined]\n- [request body.1.solution_type]: types that failed validation:\n - [request body.solution_type.0]: expected value to equal [security]\n - [request body.solution_type.1]: expected value to equal [observability]\n - [request body.solution_type.2]: expected value to equal [elasticsearch]'
+        '[request body]: types that failed validation:\n- [request body.0.solution]: expected at least one defined value but got [undefined]\n- [request body.1.solution_type]: types that failed validation:\n - [request body.solution_type.0]: expected value to equal [security]\n - [request body.solution_type.1]: expected value to equal [observability]\n - [request body.solution_type.2]: expected value to equal [elasticsearch]\n - [request body.solution_type.3]: expected value to equal [search]'
       );
     });