Agent version 2.15.1

Changed

Dependency updates:

• kubernetes libraries to 0.31.1
• stormforge-go to 4.3.3
• go-application to 0.0.86
• prometheus/client_golang to 1.20.4
• prometheus/common to 0.60.0
• terratest to 0.47.2

Fixed

• Fixed the issue of the Agent not cleaning up stale metrics for deleted containers.