## About The Pull Request
Grounding rods didn't have a circuit properly defined. This meant that
mapped-in grounding rods (and presumably admin spawned ones) could not
be upgraded and did not yield any parts or a circuit board when
deconstructed. Now they do have a circuit defined.
Fixes#84588
## Changelog
🆑
fix: Mapped in grounding rods can be upgraded again (not that upgraded
parts do anything for it) and don't disappear when deconstructed
anymore.
/🆑