[k8s] async formatClusterLink (#21535)

This is a refactor PR for formatClusterLink.
It rewrites it to be an API and allows async creation of cluster link.

Signed-off-by: Tomasz Szuba <tszuba@box.com>

plugins/kubernetes/src/plugin.ts

@@ -20,6 +20,10 @@ import {
   kubernetesAuthProvidersApiRef,
   KubernetesAuthProviders,
   KubernetesProxyClient,
+  kubernetesClusterLinkFormatterApiRef,
+  getDefaultFormatters,
+  KubernetesClusterLinkFormatter,
+  DEFAULT_FORMATTER_NAME,
 } from '@backstage/plugin-kubernetes-react';
 import {
   createApiFactory,
@@ -97,6 +101,17 @@ export const kubernetesPlugin = createPlugin({
         });
       },
     }),
+    createApiFactory({
+      api: kubernetesClusterLinkFormatterApiRef,
+      deps: {},
+      factory: deps => {
+        const formatters = getDefaultFormatters(deps);
+        return new KubernetesClusterLinkFormatter({
+          formatters,
+          defaultFormatterName: DEFAULT_FORMATTER_NAME,
+        });
+      },
+    }),
   ],
   routes: {
     entityContent: rootCatalogKubernetesRouteRef,