Glazed Terracotta Blocks are moved by pistons

Release_446687

Summary:
Glazed Terracotta Blocks are moved by pistons. When these blocks were implemented in the Java Edition, they were designed to be immovable by pistons/slime blocks.

Impact:
Contraptions decorated with Glazed Terracotta Blocks break. BLOZARK features a couple of these contraptions, and they would need to be changed to either obsidian or bedrock to fix, which would break the visual of the room.

Repro Steps:
1. Create a new world
2. Give yourself a sticky piston, any color of Glazed Terracotta Block, and a Redstone Block
3. Place the sticky piston pointing up, and place the Glazed Terracotta Block on top of it.
4. Place the Redstone Block next to the piston to power it

Observed results:
Piston extends.

Expected results:
Piston should not extend.

Screenshots/videos attached:
No