Bindless Textures in active use are able to be garbage collected

It is possible for textures referenced in the bindless texture data assets that are actively used in materials being rendered in the active viewport to be garbage collected.

This results in the material rendering as a default, black texture.

1. Create a material that uses bindless textures
2. Apply this to a material in the world
3. Package the project
4. Observe that GC will collect the texture

Expected: Material maintains texture
Actual: Material defaults when the underlying texture is pulled