Port PR from PBS-Go: Metrics: Add connection dial metrics by adapter

[cross-repo-issue-creation]

A PR was merged over on PBS-Go

• Metrics: Add connection dial metrics by adapter prebid-server#4528
• timestamp: 2025-09-23T19:40:21Z

[bsardo]

This is probably something you can ignore as these metrics were driven by an issue we had with a specific Go networking package. The production issue was the result of not setting a dialer timeout and by default it would never time out which would cause buffers to fill up.