Revert all 7.21 Galio changes.

Galio is meant to be a tank that cn be played in top and mid, and he meant to be a tank that counters AP damage, while champions like Malphite and Rammus are meant to be physical damage counters. But why can they build full tank, but you changed Galio to be an AP Tank? Wut?

Now Galio has no more proper identity after this change. He builds Health + AP items to become tanky but still melts like butter because he can't efficiently build Armor and MR items because AP Armor and MR items don't come with health. He can't build Abyssal Mask anymore because he loses too much damage and cannot lane anymore mid. He has to take Aftershock to try and help his Armor and MR problems, but that only helps him every 35 seconds.

Revert all 7.21 changes and bring Galio back to full tank Galio mid which I miss.