chore: update grafana monorepo to v12.3.0 (#1508)

| datasource | package           | from               | to     |
| ---------- | ----------------- | ------------------ | ------ |
| npm        | @grafana/alerting | 12.3.0-19117376164 | 12.3.0 |
| npm        | @grafana/data     | 12.2.1             | 12.3.0 |
| npm        | @grafana/runtime  | 12.2.1             | 12.3.0 |
| npm        | @grafana/schema   | 12.2.1             | 12.3.0 |
| npm        | @grafana/ui       | 12.2.1             | 12.3.0 |

Signed-off-by: renovate-sh-app[bot] <219655108+renovate-sh-app[bot]@users.noreply.github.com>
Co-authored-by: renovate-sh-app[bot] <219655108+renovate-sh-app[bot]@users.noreply.github.com>

Author: renovate-sh-app[bot]

package.json

@@ -107,7 +107,7 @@
   },
   "dependencies": {
     "@emotion/css": "11.13.5",
-    "@grafana/alerting": "12.3.0-19117376164",
+    "@grafana/alerting": "12.3.0",
     "@grafana/data": "^12.1.0",
     "@grafana/faro-web-sdk": "1.19.0",
     "@grafana/runtime": "^12.1.0",