What happened + What you expected to happen

Context

This parameter is already overloaded with semantic, let's actually simplify it and make it consistent across Task/Actor pools:

Proposed Changes

• Single int concurrency should just be max_concurrency (for both Tasks and Actors)

• By default all Task/Actor Pools are autoscaling (ie [0, max_concurrency])

• We add additional param/config to disable autoscaling for Actor Pools (which will then make Actor Pools have exactly max_concurrency actors)

• Instead of providing a tuple we'd just expose individual params min/max/initial_op_concurrency

Versions / Dependencies

NA

Reproduction script

NA

Issue Severity

None