Cleanup 'Cluster' to remove environment specific details (#6951)

- requestNamespaceListPermissions is infallable so no need to have the extra try/catch

- Refactor isMetricHidden method away from Cluster

- Refactor shouldShowResource out of Cluster

- Refactor isInLocalKubeconfig out of Cluster

- Remove depecrated and unused workspace from Cluster

- Refactor out kubectl as a dependency of Cluster

- Remove from cluster getter used only once

- Split out ClusterConnection from Cluster

- Also split out KubeAuthProxyServer from ContextHandler

- Rename ContextHandler to PrometheusHandler

- Cleanup onNetworkOffline/Online impls within ClusterManager

- Remove annotations from ClusterConnection

- Remove mobx annotations from Cluster

- Rename loadConfigFromFileInjectable

- Remove all uses of dead createClusterInjectionToken

- Fix type errors related to broadcastConnectionUpdate

Signed-off-by: Sebastian Malton <sebastian@malton.name>

packages/core/src/main/cluster/load-proxy-kubeconfig.injectable.ts

@@ -0,0 +1,31 @@
+/**
+ * Copyright (c) OpenLens Authors. All rights reserved.
+ * Licensed under MIT License. See LICENSE in root directory for more information.
+ */
+import type { KubeConfig } from "@kubernetes/client-node";
+import { getInjectable, lifecycleEnum } from "@ogre-tools/injectable";
+import type { Cluster } from "../../common/cluster/cluster";
+import loadConfigFromFileInjectable from "../../common/kube-helpers/load-config-from-file.injectable";
+import kubeconfigManagerInjectable from "../kubeconfig-manager/kubeconfig-manager.injectable";
+
+export type LoadProxyKubeconfig = () => Promise<KubeConfig>;
+
+const loadProxyKubeconfigInjectable = getInjectable({
+  id: "load-proxy-kubeconfig",
+  instantiate: (di, cluster) => {
+    const loadConfigFromFile = di.inject(loadConfigFromFileInjectable);
+    const proxyKubeconfigManager = di.inject(kubeconfigManagerInjectable, cluster);
+
+    return async () => {
+      const proxyKubeconfigPath = await proxyKubeconfigManager.ensurePath();
+      const { config } = await loadConfigFromFile(proxyKubeconfigPath);
+
+      return config;
+    };
+  },
+  lifecycle: lifecycleEnum.keyedSingleton({
+    getInstanceKey: (di, cluster: Cluster) => cluster.id,
+  }),
+});
+
+export default loadProxyKubeconfigInjectable;