DefaultLogger writes to console synchronously which may be a problem with virtual threads

Quoting @anuchandy

> Another interesting learning about VirtualThreads – Logging statements in the code that runs using VirtualThreads can be problematic. Given/If each log statement does IO call, the runtime can treat it just like a normal IO call (e.g. http) and can unmount the VirtualThread instance. So, with many VirtualThreads doing logging cause runtime to spend more time in internal mount-unmount ops, and managing creation/retrieval continuations from Heap.

We should test it and look into making default logger asynchronous or virtual thread-friendly.