Adapt to new Hetzner plans[1] for lower cost and better specs!

CX11  -> CX22: Same price and better specs!
CX21  -> CX22: Cheaper price and same specs!
CX31  -> CX32: Cheaper price and better specs!
CPX11 -> CX22: Same price and similar spec! (for consistency)
CPX21 -> CX32: Cheaper price and better specs!
CPX41 -> CX42: Cheaper price and similar specs!

Some of the CX11 servers are not rescaled as they are on older, cheaper
grandfathered plans.

[1] https://www.hetzner.com/news/new-cx-plans/