When performing preview job rendering the memory wasn't recycled leading
to a memory leak. For background rendering we already recycled memory in
a correct way. This change enables the same branch during preview
rendering.
Also adds a better `VKDevice::debug_print` to see the resources being
tracked by the different threads and resource pools.
Pull Request: https://projects.blender.org/blender/blender/pulls/128377
0eff22dd2a