ci.jenkins.io operation on container agents (Kubernetes 1.28)

ACP for the cluster ci agents in cluster cijenkinsioagents1 ci agents for bom in cluster cijenkinsioagents1

[Final message]

Upgrade finished.

[Initial message] We’re (infra team) doing an AKS clusters upgrade from 1.27 to 1.28 the Tuesday 25th of June 2024, starting at 08:00 UTC (10h paris time). It will impact the ci.jenkins.io container agents (both jnlp-linux-* and jnlp-bom templates) but the VM agents will still be available.