[infra.ci.jenkins.io] Azure SP (for VM Agents) credential rotation

[dduportal]

The credentials, on infra.ci.jenkins.io, used to spin up Azure VM agents expires on the 26 September 2024: https://github.com/jenkins-infra/azure/pull/822

[dduportal]

• PR merged and deployed with success
• Credential updated on SOPS: (private link) https://github.com/jenkins-infra/charts-secrets/commit/97fda2a384caaa53e9ada6e48f7307529ecc9051
• Kubernetes Management job executed
• Controller infra.ci.jenkins.io restarted (rollout)
• Azure VM agents are now spinned up with success

[dduportal]

Update: opened https://github.com/jenkins-infra/azure/pull/839 to fix the documentation (in the PR body - see https://github.com/jenkins-infra/azure/pull/822)