Update the helm labels to new app.kubernetes.io namespace

# Describe the feature you'd like to have #

Update the helm charts labels to the new app.kubernetes.io namespace:
https://helm.sh/docs/topics/chart_best_practices/labels/#standard-labels

# What is the value to the end user? (why is it a priority?) #

Helm chart is up to standard, what the users expect.

# How will we know we have a good solution? (acceptance criteria) #

All the helm labels updated to the new namespace.

Review the repository's Helm charts and compare their labels with the linked Helm standard-label guidance. Update every chart label to the app.kubernetes.io namespace, then verify that all Helm labels use the new namespace.

Written by the indexing model from the issue text.