structure_void blockshape is no longer a small cube

Partner Rank: 3

Verification builds: 1.13.0.18
Regression builds: 1.12

Summary: The structure_void blockshape is now the size of a full block rather than being smaller.

Impact: Puzzle in Hardcore Island doesn't look as intended.

Repro Steps:

1. Download and open Hardcore Island.
2. Place some string.

Expected Results: Small cube with portal texture.

Observed Results: Full-sized block with portal texture.

Screenshots/Videos attached: Yes