Allow inline actor logic

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| Name | Type | | ------ | ----- | | xstate | Minor |

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[Andarist]

The problem is that by allowing inline actor logics you allow them to override the ones that are configured and that leads to problems:

const m = setup({
  types: { children: { foo: 'myChild' } },
  actors: {
    myChild: fromPromise(async () => "")
  }
}).createMachine({
  entry: spawnChild(fromPromise(async () => 100), { id: 'foo' })
})

const actorRef = createActor(m)
const val = actorRef.getSnapshot().children.foo.getSnapshot().output // actual: number | undefined, expected: string | undefined

[davidkpiano]

The problem is that by allowing inline actor logics you allow them to override the ones that are configured and that leads to problems:

const m = setup({
  types: { children: { foo: 'myChild' } },
  actors: {
    myChild: fromPromise(async () => "")
  }
}).createMachine({
  entry: spawnChild(fromPromise(async () => 100), { id: 'foo' })
})

const actorRef = createActor(m)
const val = actorRef.getSnapshot().children.foo.getSnapshot().output // actual: number | undefined, expected: string | undefined

This really makes me think that the way that child actors are defined is a bit awkward currently. Would love to revisit this for v6