Invalid LocalState of primitives after resuse

[Inuniku]

Please see #3142 for an attempted partial fix. Might be related to #3125.

In my concrete case I used a list of loaded glb-files. After changing the list, sometimes the whole glb-scene wouldn't show up anymore.

This is because changing the list while using the same primitive (as useGLTF gives the same cached scene) the isPrimitive tag got cleared and that caused the whole gltf scene to dispose/unmount.

I created a test to reproduce my case:

// Initialize a list of primitives
await act(async () =>
  root.render(
    <group>
      <primitive key={'a'} object={primitive1} name="p1" dispose={null} />
    </group>,
  ),
)

expect((primitive1 as any).__r3f?.type).toBe('primitive')

// New list of primitives while reusing primitive object
await act(async () =>
  root.render(
    <group>
      <primitive key={'b'} object={primitive1} name="p1" dispose={null} />
      <primitive key={'c'} object={primitive2} name="p2" dispose={null} />
    </group>,
  ),
)

expect((primitive1 as any).__r3f?.type).toBe('primitive') // fails, is '' instead
expect((primitive2 as any).__r3f?.type).toBe('primitive')

I created a test where a similar bug happens, which has not yet been addressed by me. This test still fails:

await act(async () =>
  root.render(
    <group>
      <primitive object={primitive1} dispose={null} />
    </group>,
  ),
)
expect((primitive1 as any).__r3f?.type).toBe('primitive')
await act(async () =>
  root.render(
    <group>
      <primitive object={primitive2} dispose={null} />
      <primitive object={primitive1} dispose={null} />
    </group>,
  ),
)
expect((primitive1 as any).__r3f?.type).toBe('primitive') 
expect((primitive2 as any).__r3f?.type).toBe('primitive')