Embedding Projector: fix camera controls

[alicialics]

Motivation for features / changes

OrbitControl in Embedding Projector is not working. The current code is noop (because of a different Three.js version?) That means that:

1. 2D mouse controls are not working as expected (cannot pan camera)
2. 3D mouse controls are just using Three.js defaults

Technical description of changes

Remove all 3D orbitControl code handling since they are noop Fixes 2D camera panning

Screenshots of UI changes

N/A

Detailed steps to verify changes work correctly (as executed by you)

1. Toggle t-SNE 2D mode
2. Verify left mouse pans

Alternate designs / implementations considered