[Hybrid] Crash with (too many) large images?

Nobody has claimed this yet.

### Problem

Vello Hybrid will crash (panic) if it is given very large raster image(s). The panic message was something like "out of texture memory".

### Notes

- We're talking 5-10 images with dimensions in the 1000-3000px range.
- The large size is the source image data. The images were actually being rendered at a much smaller size
- Vello CPU and Vello Classic both were both able to correctly render the Scene (albeit not with fantastic performance).

I don't currently have a reproduction (this was happening on an older version of https://servo.org, but they have since reduced the size of their images). But it should be relatively easy to reproduce.

I'm not sure what the best solution for this is (should we handle this case? return an error? render the rest of the scene skipping the large image?), but I'm pretty sure we shouldn't crash.

Start by reproducing the crash in Vello Hybrid with 5–10 large raster images rendered at a smaller size, then compare the result with Vello CPU and Vello Classic. Trace the reported "out of texture memory" panic and determine the intended behavior for oversized images; done means the scene no longer crashes and that behavior is covered by a regression test.

Written by the indexing model from the issue text.