Upgrade of the `publick8s-sponsored` cluster to Kubernetes 1.35

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[Final Message] upgrade went well, no impact on production.

[Initial Message] Thursday 05 November 2026 at 09:00AM UTC, we’ll upgrade the the Azure AKS cluster publick8s to Kubernetes 1.35. The operation is expected to take between 60 and 90 min.

The expected impacts are:

Restart of the following services, with a downtime between 2 and 15 min (depends on Azure Storage systems):

• ldap.jenkins.io
• weekly.ci.jenkins.io
• incrementals.jenkins.io
• plugin-health.jenkins.io

Temporary disruptions (no Log-in/log-out possible during the LDAP restart) on:

• accounts.jenkins.io
• ci.jenkins.io, trusted.ci.jenkins.io, infra.ci.jenkins.io, weekly.ci.jenkins.io, release.ci.jenkins.io, cert.ci.jenkins.io
• issues.jenkins.io (Jira)

Temporary disruptions (slow requests or outage of a few minutes) on all user facing services.

More details in https://github.com/jenkins-infra/helpdesk/issues/5168#issuecomment-6652774085.