Move test images from the repository

[GrigoreMihai]

Problem

Currently the test images are adding to much weight to the repository making it hard to get it locally.

Description

The images can be simply moved to another source or git LFS can be used for this.

[sarayourfriend]

@dhruvkb @krysal and I had talked about how we could do this potentially, maybe using git submodules and moving the images into a separate repository. However, while that would improve the initial clone times, it would massively complicate updating the snapshots on PRs (you'd have to open two PRs and somehow tell CI to run the snapshot tests using the corresponding branch in the VR images repository).

We could use git-lfs :shrug: