Replace TimeoutCancellationException with TimeoutException

[qwwdfsad]

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In the current version of the library, withTimeout throws TimeoutCancellationException when a timeout was exceeded.

It can lead to very subtle errors, for example:

launch {
    val result = withTimeout(...) {
        // ... some computation ...
    }
    // process result
}

TimeoutCancellationException is CancellationException, thus is never reported. But in the snippet above, it's likely to be a programmatic error. If it is expected to miss the deadline, then withTimeoutOrNull should be used explicitly.

My proposal is deprecation of TimeoutCancellationException and replacement with TimeoutException that is not CancellationException