Add OnUpdateGrid inside GridTable

[RubensKj]

Description

The idea is to remove all the logic from AbstractGrid from GridTable. On way to solve this dependency problem is to add a Action (Unity Event) OnUpdateGrid and execute when Pickup or Place item.

Implementation ideas

Instead of having a list of Abstract Grids, we're going to have an event, that will be triggered on place/pickup, and the Abstract Grids (that contains the Grid) will implement this event for refresh the UI.

• Add button for update the GridTableAnchorSo in the AbstractGrid UI Unity.
• Fix the AbstractGrid for clearing the grid UI when change the Grid

[rush-github-bot[bot]]

/cc @rubenskj (grids,items,ux-ui)