Support referencing a Kubernetes Secret by key in environment variable configuration

[oscerd]

Component

OpenShift Maven Plugin

Is your enhancement related to a problem? Please describe

It's not possible as of today to do something like https://quarkus.io/guides/deploying-to-openshift#environment-variables-from-secret

Describe the solution you'd like

this means being able to do something like.

                <groupId>org.eclipse.jkube</groupId>
                <artifactId>openshift-maven-plugin</artifactId>
                <version>${camel.springboot.jkube.version}</version>
                <configuration>
                    <resources>
                        <env>
                            <AZURE_CLIENT_ID>{secret_name:secret_key}</AZURE_CLIENT_ID>
                            <AZURE_TENANT_ID>{secret_name:secret_key}</AZURE_TENANT_ID>
                            <AZURE_CLIENT_SECRET>{secret_name:secret_key}</AZURE_CLIENT_SECRET>
                        </env>
                    </resources>
                </configuration>

Describe alternatives you've considered

Setting env variables directly in the xml, but it's not a good security practice

Additional context

No response