function getHeaderName() {
    return "User-Agent";
}
Creates a native AbortSignal which reflects the state of the provided AbortSignalLike.
If the AbortSignalLike is already a native AbortSignal, it is returned as is.
@param abortSignalLike - The AbortSignalLike to wrap.
@returns - An object containing the native AbortSignal and an optional cleanup function. The cleanup function should be called when the AbortSignal is no longer needed.