Remove Deprecated plugin "Handlebars" from our instances

[dduportal]

Service(s)

ci.jenkins.io, release.ci.jenkins.io, trusted.ci.jenkins.io, cert.ci.jenkins.io

Summary

We want to remove this plugins from our controllers

• ci.jenkins.io (manually managed plugins: remove from UI and restart)
• trusted.ci.jenkins.io (manually managed plugins: remove from UI and restart)
  - [] cert.ci.jenkins.io (manually managed plugins: remove from UI and restart)
• release.ci.jenkins.io (Remove from Docker image + remove from UI once deployed)
  - [ ] infra.ci.jenkins.io (not installed in docker-jenkins-weekly image)
  - [ ] weekly.ci.jenkins.io (not installed in docker-jenkins-weekly image)

Reproduction steps

No response

[MarkEWaite]

Nice to have this excuse to test drive the plugin removal instructions proposed at

• Uninstalling a plugin #1531 jenkinsci/docker#1538

I believe that the multi-step process described by @dduportal is the most reliable, but I'd love to have a one step process that did it. The process is:

• Remove plugin(s) from the container definition and create a new container definition
• Stop the old container
• Start the new container
• Remove the plugin(s) using the "Manage Jenkins" page
• Complete the plugin removal by restarting the controller

[dduportal]

I forgot to close the issue but it's done everywhere \o/