Tileset terrain's center bit doesn't update when the terrains change position inside a terrain set

[mrcdk]

Godot version

v4.0.rc5.official [6296b46]

System information

Manjaro Linux

Issue description

When moving the terrains inside a terrain set the center of each tile won't update and will keep the old value.

screen-2023-02-25_14.37.27.mp4

Steps to reproduce

See attached video.

Minimal reproduction project

N/A

[dandeliondino]

I believe the issue stems from TileData terrain values not being updated in TileData::move_terrain. The fix would likely be similar to the fix for deleted terrains: #79618.

I wonder if this could be marked as good for beginners to attract a contributor?