MySQL Backend brings down Grafana: Error 9119 (HY000): The access token has expired. Please acquire a new token and retry.

### What happened? When using Access token for authentication against the MySQL Database, it crashes when the access token is expired and brings down the whole page. When using Grafana in kiosk mode, it requires manually refreshing the page. We have configured Grafana DB like this: ```yaml GF_DATABASE_URL: mysql://${GRAFANA_DB_USERNAME}:$__file{/var/run/secrets/ossrdbms-aad/token}@${GRAFANA_DB_HOST}/grafana?allowCleartextPasswords=1 ``` And have a sidecar container in the pod that refreshes the token before it expires (its running in Kubernetes). https://github.com/equinor/radix-flux/blob/master/components/third-party/grafana/chart/helmRelease.yaml#L100 ## Error log: ```text grafana logger=ngalert.scheduler t=2024-08-16T01:02:10.020057967Z level=error msg="Failed to update alert rules" error="Error 9119 (HY000): The access token has expired. Please acquire a new token and retry." grafana logger=datasources t=2024-08-16T01:02:10.035879669Z level=error msg="Failed getting data source" err="Error 9119 (HY000): The access token has expired. Please acquire a new token and retry." uid=000000007 id=0 name= orgId=1 grafana logger=ngalert.scheduler rule_uid=XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX org_id=1 version=43 fingerprint=9c5996d4279bc884 attempt=1 now=2024-08-16T01:02:10Z rule_uid=XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX org_id=1 t=2024-08-16T01:02:10.035910758Z level=error msg="Failed to build rule evaluator" error="failed to build query 'A': Error 9119 (HY000): The access token has expired. Please acquire a new token and retry." grafana logger=ngalert.state.manager rule_uid=XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX org_id=1 t=2024-08-16T01:02:10.035966733Z level=info msg="Detected stale state entry" cacheID="[[\"__alert_rule_namespace_uid__\",\"XXXXXX\"],[\"__alert_rule_uid__\",\"XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX\"],[\"alertname\",\"Hydrate Alert\"],[\"classifier\",\"DESCRIPTION\"],[\"grafana_folder\",\"Team\"],[\"team\",\"Team\"]]" state=Normal reason= grafana logger=ngaler…