Merge branch 'loki-refactor-warnings' into 'master'

Adding Helm upgrade notices for recent Loki refactor changes

See merge request platform-one/big-bang/bigbang!1997

chart/templates/NOTES.txt

@@ -132,6 +132,16 @@ PLATFORM ONE LOGGING WARNING:
   After the beta period, only one logging stack will be supported at one time, with the PLG stack becoming the default supported stack.
 {{- end }}
 
+{{- if and $.Values.loki.enabled (dig "values" "global" "createGlobalConfig" false $.Values.loki) }}
+PLATFORM ONE LOKI WARNING:
+  You still have Loki global values set but this version of Loki has changed significantly, please review the latest production document within the Loki package repo: https://repo1.dso.mil/platform-one/big-bang/apps/sandbox/loki/-/blob/main/docs/production.md
+{{- end }}
+
+{{- if and $.Values.loki.enabled (dig "values" "gel" "enabled" false $.Values.loki) }}
+PLATFORM ONE LOKI WARNING:
+  You still have Loki gel values set but this version of Loki has changed significantly, please review the latest grafana enterprise document within the Loki package repo: https://repo1.dso.mil/platform-one/big-bang/apps/sandbox/loki/-/blob/main/docs/grafana-enterprise.md
+{{- end }}
+
 {{- if and $.Values.jaeger.enabled .Values.tempo.enabled }}
 PLATFORM ONE TRACING WARNING:
   You have enabled both Jaeger and Tempo Tracing Engines.  This is permitted during beta testing of Tempo.