kubernetes plugin adds support for the new plugin system (#16719)

* kubernetes plugin adds support for the new plugin system

Signed-off-by: Oleg S <97077423+RobotSail@users.noreply.github.com>

* expose experimental plugin support as an alpha feature in kubernetes-backend

Signed-off-by: Oleg S <97077423+RobotSail@users.noreply.github.com>

* remove duplicate changeset

Signed-off-by: Oleg S <97077423+RobotSail@users.noreply.github.com>

* update permissions

Signed-off-by: Oleg S <97077423+RobotSail@users.noreply.github.com>

---------

Signed-off-by: Oleg S <97077423+RobotSail@users.noreply.github.com>

packages/backend-next/package.json

@@ -28,6 +28,7 @@
     "@backstage/backend-defaults": "workspace:^",
     "@backstage/plugin-app-backend": "workspace:^",
     "@backstage/plugin-catalog-backend": "workspace:^",
+    "@backstage/plugin-kubernetes-backend": "workspace:^",
     "@backstage/plugin-scaffolder-backend": "workspace:^",
     "@backstage/plugin-search-backend": "workspace:^",
     "@backstage/plugin-search-backend-module-catalog": "workspace:^",

packages/backend-next/src/index.ts

@@ -24,6 +24,7 @@ import { searchPlugin } from '@backstage/plugin-search-backend/alpha';
 import { searchModuleCatalogCollator } from '@backstage/plugin-search-backend-module-catalog/alpha';
 import { searchModuleTechDocsCollator } from '@backstage/plugin-search-backend-module-techdocs/alpha';
 import { searchModuleExploreCollator } from '@backstage/plugin-search-backend-module-explore/alpha';
+import { kubernetesPlugin } from '@backstage/plugin-kubernetes-backend/alpha';
 
 const backend = createBackend();
 
@@ -45,4 +46,6 @@ backend.add(searchModuleCatalogCollator());
 backend.add(searchModuleTechDocsCollator());
 backend.add(searchModuleExploreCollator());
 
+// Kubernetes
+backend.add(kubernetesPlugin());
 backend.start();