[Jenkins Agents] Clean up deprecated JNLP arguments

[dduportal]

Service(s)

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

Summary

Since https://github.com/jenkinsci/remoting/releases/tag/3190.va_7870fc137d9 (and associated Docker image https://github.com/jenkinsci/docker-agent/releases/tag/3190.va_7870fc137d9-1), the entrypoint and parameter of the agent.jar CLI used to initialize an agent has to be updated to stop using the deprecated forms.

Thanks to @basil, some work has already been done in the Jenkins (inbound) agent images we utilizes on most of the container usages, but it is worth sweeping the Jenkins infra for such usages

Reproduction steps

No response

[dduportal]

Actionable for the Jenkins infra team: jenkins-infra/jenkins-infra#3250 (thanks @basil again for the thoroughly help here!)

[dduportal]

Starting on cert.ci to test the proposed changes

[dduportal]

Starting on cert.ci to test the proposed changes

Next: trying on ci.jenkins.io with:

• Puppet disabled
• Manual changes on the cloud.yaml
• JCasc reload
• Validating with the acceptance test job: https://ci.jenkins.io/job/Infra/job/acceptance-tests/job/check-agent-availability/3372/

=> in case of error, running again puppet would be good enough