HCP Link Status (#16959)

* adds LinkStatus component to NavHeader to display banner with HCP link status

* adds changelog entry

* adds period to connected status message

* updates hcp link status to current cluster polling to automatically update state

ui/app/components/link-status.js

@@ -0,0 +1,29 @@
+import Component from '@glimmer/component';
+import { inject as service } from '@ember/service';
+
+/**
+ * @module LinkStatus
+ * LinkStatus components are used to indicate link status to the hashicorp cloud platform
+ *
+ * @example
+ * ```js
+ * <LinkStatus @status={{this.currentCluser.cluster.hcpLinkStatus}} />
+ * ```
+ *
+ * @param {string} status - cluster.hcpLinkStatus value from currentCluster service
+ */
+
+export default class LinkStatus extends Component {
+  @service store;
+  @service version;
+
+  get showBanner() {
+    // enterprise only feature at this time but will expand to OSS in future release
+    // there are plans to handle connection failure states -- only alert if connected until further states are returned
+    return this.version.isEnterprise && this.args.status === 'connected';
+  }
+
+  get bannerClass() {
+    return this.args.status === 'connected' ? 'connected' : 'warning';
+  }
+}