StickyPartitioner implemented

[alrz1999]

Add StickyPartitioner to Balancer.go closes #584

[nlsun]

hi @alrz1999, any updates here?

[nmerkulov]

@nlsun @alrz1999 heya, i can continue with that branch. I need that thing and for now it seems impossible to implement StickyBalancer as external balancer

[nlsun]

@nmerkulov go for it!

[achille-roussel]

Hello @nmerkulov, do you have any updates to share on that front?

[kislerdm]

Hey folks! Any update wrt this PR? Is there any timeline for a release with sticky partitioner available as a re-balancing protocol? To add, any thoughts about implementing the CooperativeStickyAssignor to cover incremental cooperative rebalancing (find details here)?

[nlsun]

@kislerdm Hello! We welcome contributions to both this StickyPartitioner and CooperativeStickyAssignor

[zekth]

@nlsun would it be ok to spin-up a new PR with improvements/applied reviews on this one? Spotted few nits and i'm happy to make this land.

[nlsun]

@zekth yes, go for it!