Check whether creating GPU textures succeeds before using them.
However, currently when that happens there is no indication to the user
that "hey the resolution is maybe too big". Not sure what is the best
way to do that however; e.g. Workbench rendering also does not
indicate that in a similar scenario.
While at it, add GPU_is_safe_texture_size instead of duplicating
the same logic in two places.
Pull Request: https://projects.blender.org/blender/blender/pulls/147043
ed9fc54e0e