GrafanaUI: Add new EmptyState component (#84891)

* add empty search state component

* extract translations

* nicer prop spreading

* actually expose component in grafana-ui

* use requestAnimationFrame

* add rollup-plugin-svg-import

* move to a single EmptyState component with variants

* update docs

* remove CTA

* add some more prop documentation

* just use 1 svg

public/locales/en-US/grafana.json

@@ -563,6 +563,9 @@
     "drawer": {
       "close": "Close"
     },
+    "empty-state": {
+      "search-message": "No results found"
+    },
     "modal": {
       "close-tooltip": "Close"
     },