Initialize global trace collector for Poco::ThreadPool

Why it matters

This feature sets up a global trace collector to monitor and trace operations within Poco::ThreadPool, which is necessary for components like Keeper. It improves observability and debugging capabilities by enabling detailed tracing of thread pool activity.

How to use it

The global trace collector for Poco::ThreadPool is initialized automatically. Users leveraging components like Keeper that depend on thread pool tracing will benefit from this feature without additional configuration.