[Staleness] Fix staleness on clock change (#7088)

* Update staleness mixin
* Fix listeners and add guard
* Add check to make sure staleness only shows for correct clock
* Add guard for time api
* Cleanup the setting of isStale in ObjectView
* Cleanup use of combinedKey on LadTableSet

src/plugins/displayLayout/components/TelemetryView.vue

@@ -240,6 +240,11 @@ export default {
 
     this.status = this.openmct.status.get(this.item.identifier);
     this.removeStatusListener = this.openmct.status.observe(this.item.identifier, this.setStatus);
+
+    this.setupClockChangedEvent((domainObject) => {
+      this.triggerUnsubscribeFromStaleness(domainObject);
+      this.subscribeToStaleness(domainObject);
+    });
   },
   beforeUnmount() {
     this.removeStatusListener();