Release notes for Grafana 9.0.4

Browse/Search: Make browser back work properly when visiting Browse or search. #52271, @torkelo
Logs: Improve getLogRowContext API. #52130, @gabor
Loki: Improve handling of empty responses. #52397, @gabor
Plugins: Always validate root URL if specified in signature manifest. #52332, @wbrowne
Preferences: Get home dashboard from teams. #52225, @sakjur
SQLStore: Support Upserting multiple rows. #52228, @joeblubaugh
Traces: Add more template variables in Tempo & Zipkin. #52306, @joey-grafana
Traces: Remove serviceMap feature flag. #52375, @joey-grafana

Access Control: Fix missing folder permissions. #52410, @IevaVasiljeva
Access control: Fix org user removal for OSS users. #52473, @IevaVasiljeva
Alerting: Fix Slack notification preview. #50230, @ekrucio
Alerting: Fix Slack push notifications. #52391, @grobinson-grafana
Alerting: Fixes slack push notifications. #50267, @jgillick
Alerting: Preserve new-lines from custom email templates in rendered email. #52253, @alexweav
Insights: Fix dashboard and data source insights pages. (Enterprise)
Log: Fix text logging for unsupported types. #51306, @papagian
Loki: Fix show context not working in some occasions. #52458, @svennergr
Loki: Fix incorrect TopK value type in query builder. #52226, @ivanahuckova