Update grafana monorepo to v0.4.0 (#52805)

* Update grafana monorepo to v0.4.0

* update mock

* actually mock...

* typescript is hard...

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: Ashley Harrison <ashley.harrison@grafana.com>

package.json

@@ -249,8 +249,8 @@
   "dependencies": {
     "@emotion/css": "11.9.0",
     "@emotion/react": "11.9.0",
-    "@grafana/agent-core": "^0.3.0",
-    "@grafana/agent-web": "^0.3.0",
+    "@grafana/agent-core": "0.4.0",
+    "@grafana/agent-web": "0.4.0",
     "@grafana/aws-sdk": "0.0.37",
     "@grafana/data": "workspace:*",
     "@grafana/e2e-selectors": "workspace:*",