Blender Git Loki

Fix T85139: Force field texture missing depsgraph relation

If a force field was of type "Texture", any changes of that texture (e.g.
its type - as reported in T85139 - or also its properties) were not
properly updating rigid bodies and particle systems.

Now ensure that texture is actually in the depsgraph and set up relation
accordingly.

Also fixes T75198.

Maniphest Tasks: T85139

Differential Revision: https://developer.blender.org/D10234