Adds publishing stage for Aptly in Jenkins pipeline

Introduces a new stage in the Jenkins pipeline to publish Debian packages to Aptly.

This enhancement streamlines the deployment process, ensuring that packages are published efficiently as part of the CI/CD workflow.

Author: Vítězslav Dvořák

debian/Jenkinsfile

@@ -103,3 +103,9 @@ distributions.each { distro ->
     }
 }
 parallel branches
+
+node {
+    stage('Publish to Aptly') {
+        publishDebToAptly()
+    }
+}