Simplify the code to add ViewModel LifecycleEventObserver to local lifecycle owner

[dmitriy-chernysh]

Move addObserver() to rememberViewModel fun

        val viewModel = rememberViewModel<SomeViewModel>(
            modules = {
                listOf(featureSomeModule)
            }
        )

        LaunchedEffect(lifecycleOwner) {
            lifecycleOwner.lifecycle.addObserver(viewModel)
        }

BaseViewModel should inherit LifecycleEventObserver