Fix granito bugs

[MatusGuy]

closes #2796

TODO:

• Tux cannot unduck in front of Granito
• Rock Rolling and Granito don't mix (gets force pushed out of Granito hitbox)
• Tux falls off Granito when going up (and maybe down?) a slope
• Granito becomes a conveyor belt
• Plays walking animation when landing/staying on a slope
• Granito set to type "Standing" when pushed by bomb explosion never resets speed (might be better to not have them be push-able at all)
• Big Tux jittering on Granito while standing on them
• Granito can walks/falls through bricks+heavy bricks+rocks

[Rusty-Box]

This feels forgotten about. What was the status on this?

[Rusty-Box]

Just so we don't forget to fix this bug - Granito can walk through bricks+heavy bricks which is not good.
They also walk/fall through rocks.