Add backup configuration for Artemis broker deployment
This commit introduces a new backup configuration for the Artemis
broker by adding a Deployment under the `artemis-broker-backup`
section in the Helm chart values file. The configuration supports
high availability with an active-passive mode, where 'broker2' is
set as the backup broker and references 'broker1' as the active
broker.
The backup broker will use the AMQ broker image defined in the
registry, deploy at node port 30004, and route traffic through an
ingress with the specified domain of tuxnet.lan.
With this change, administrators can ensure redundancy and
improved availability for message brokering services. No existing
functionality is impacted.
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