docs: add note about the current workflow of chart management

Author: pepov

charts/logging-operator-logging/README.md

@@ -1,3 +1,7 @@
 # Logging operator logging chart
 
-The chart has been relocated [here](https://github.com/kube-logging/helm-charts/tree/main/charts/logging-operator-logging).
+This chart has been relocated under e2e/charts where it is used to run the e2e tests with.
+
+All modifications should go there first, get tested and then synchronized to https://github.com/kube-logging/helm-charts/ where it is linted and released.
+
+This is an unfortunate temporary workflow, but the plan is to move the charts back here and release from this repo to an OCI registry in the near future.

charts/logging-operator/README.md

@@ -1,3 +1,7 @@
 # Logging operator chart
 
-The chart has been relocated [here](https://github.com/kube-logging/helm-charts/tree/main/charts/logging-operator).
+This chart has been relocated under e2e/charts where it is used to run the e2e tests with. 
+
+All modifications should go there first, get tested and then synchronized to https://github.com/kube-logging/helm-charts/ where it is linted and released.
+
+This is an unfortunate temporary workflow, but the plan is to move the charts back here and release from this repo to an OCI registry in the near future.