After https://github.com/JetBrains/skiko/pull/798, we changed Dispatcher.IO to custom dispatcher.

Dispatcher.IO is based on daemon threads (thread that receives InterruptException on application exit).

Our new dispatcher isn't. The proof:
```
import java.util.concurrent.Executors
import kotlinx.coroutines.Dispatchers
import kotlinx.coroutines.asCoroutineDispatcher
import kotlinx.coroutines.runBlocking

fun main() {
    runBlocking(Dispatchers.IO) {
        println(Thread.currentThread().isDaemon) // prints true
    }
    runBlocking(Executors.newCachedThreadPool().asCoroutineDispatcher()) {
        println(Thread.currentThread().isDaemon) // prints false
    }
    val defaultFactory = Executors.defaultThreadFactory()
    runBlocking(Executors.newCachedThreadPool {
        defaultFactory.newThread(it).apply {
            isDaemon = true
        }
    }.asCoroutineDispatcher()) {
        println(Thread.currentThread().isDaemon) // prints true
    }
}
```

This PR makes threads daemon.

Reported in [Kotlin Slack](https://kotlinlang.slack.com/archives/C01D6HTPATV/p1697400320739369) - applications exits too long.