Feature: Coordinated Leader Election

[sbueringer]

Upstream KEP: kubernetes/enhancements#4355

I think it would be nice if controller-runtime would support coordinated leader election similar to how we support the "regular" leader election today

[sbueringer]

cc @alvaroaleman

[dongjiang1989]

@sbueringer @alvaroaleman I'll pick on this issue to work on

[sbueringer]

Thx!

/assign @dongjiang1989