[Native] Migrate focus/blur to call TextInputState with the host component #18068
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In order to make focus/blur work for Fabric we need to make event targets be a component instance instead of a react tag.
This PR then updates the Renderer integration with TextInputState to handle instances instead of reactTag.
In order to make that work, we have to have an instance.
This changes the HostComponents, making them pass themselves to TextInputState.
Also added tests.
For Facebook employees:
This PR will need to land and by synced in conjunction with D19458214