Dolphin-Pumbo_Input

Stable/finished version of all my input work from the last year as it gets slowly merged.
It should be stable as it's deeply tested so it can be used as any other build, but testing is appreciated.

Change log available here:
dolphin-emu#9489

Based on master from ~27/05/2021

Test

See here: dolphin-emu#8983 (comment)