Give back old overgrowth

Revert sion W buff and nerf chogath ult HP gain by 10 at all ranks.

No one likes new overgrowth. It. Sucks. Balls. It's objectively worse for tanks and juggernauts now than it was before. I used to get it to around 400-475 as darius or illaoi by the time game was over, now it never goes over 200. Rune was gimped. Getting a little extra early doesn't mean shit. Overgrowth was supposed to be the defensive counter to gathering storm. Now it's just a shit rune. Not surprisingly, the only champs that still really make use of the rune are chogath and sion still...

The only reason overgrowth might have ever been problematic was its use on sion after his W buff and chogath. Gimping it versus them was not the answer.

Gib back old overgrowth.