Add Kafka source observability metrics - #7102

The Security Check did not find any new vulnerabilities in this branch.

Base branch total remaining vulnerabilities: 10
Base branch commit: 315c6c0e4f9a36e74e36f62b3d75d1e70dac8c86


Total libraries scanned: 86

Scan token: f65af042c8a347acb5df95b8614658a9