Tracker Checker: gracefully handle timeouts

[josecelano]

Parent issue: #669

Currently, you can run the Tracker Checker with this input:

TORRUST_CHECKER_CONFIG='{
    "udp_trackers": ["127.0.0.1:6969"],
    "http_trackers": ["http://127.0.0.1:7070"],
    "health_checks": ["http://127.0.0.1:1313/health_check"]
}' cargo run --bin tracker_checker

In some cases, there could be a missing timeout for network operations and in other cases where there is a timeout, the error is not handled gracefully.

This issue tracks all subtasks related to timeout issues.

Subtasks

• Tracker Checker: handle Health Check timeouts #678
• Tracker Checker: handle HTTP Tracker timeouts #679
• Tracker Checker: handle UDP Tracker timeouts #682