Add backup workflow for Helm chart packaging
This update introduces a new workflow for building and packaging the
Helm chart for the backup application, named
'backup-build-chart.yml'. This workflow triggers on pushes to the
main and dev branches that affect the 'artemis-broker-backup/Chart.yaml'
file.
Additionally, the existing build chart workflow has been renamed
from 'build-chart.yml' to 'primary-build-chart.yml' to better reflect
its purpose of handling the primary application. The app name has
also been updated in the primary workflow environment variable for
clarity.
These changes help in better organizing the CI/CD processes for
different Helm charts associated with the backup and primary
applications, improving overall workflow management.
```
Marko Oldenburg
5fa066b735