perf: Use geometry instancing in new ImageRendererV2

[eonarheim]

===:clipboard: PR Checklist :clipboard:===

• 📌 issue exists in github for these changes
• 🔬 existing tests still pass
• 🙈 code conforms to the style guide
• 📐 new tests written and passing / old tests updated with new scenario(s)
• 📄 changelog entry added (or not needed)

==================

This PR roughly doubles the performance in ex.ImageRendererV2 over ex.ImageRenderer.

TODO:

• Flag for v0.30 to fallback to the old one if needed
• Text not rendering properly yet
• Snap to pixel
• Tests

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