test(platform): ensure PLATFORM_HOST_TYPES is in sync with getPlatformList (renovatebot#42110)

As part of future changes we want to rely on the `PLATFORM_HOST_TYPES`
constant in our config options, so should make sure this stays in sync.

Author: jamietanna

lib/modules/platform/index.spec.ts

@@ -1,6 +1,6 @@
 import * as httpMock from '~test/http-mock.ts';
 import { PLATFORM_NOT_FOUND } from '../../constants/error-messages.ts';
-import type { PlatformId } from '../../constants/index.ts';
+import { PLATFORM_HOST_TYPES, type PlatformId } from '../../constants/index.ts';
 import { loadModules } from '../../util/modules.ts';
 import api from './api.ts';
 import * as platform from './index.ts';
@@ -247,4 +247,12 @@ describe('modules/platform/index', () => {
       });
     });
   });
+
+  describe('getPlatformList', () => {
+    it('has the same values as PLATFORM_HOST_TYPES', () => {
+      expect(new Set(platform.getPlatformList())).toEqual(
+        new Set(PLATFORM_HOST_TYPES),
+      );
+    });
+  });
 });