Task Framework IdealState Removal

[NealSun96]

Is your feature request related to a problem? Please describe.
We are moving away from IdealState for the task framework. Such a move allows the task framework to rely on Workflow/Job configs only, which reduces Zookeeper load by a large margin. This lays the foundation of transition task framework from the "helix-like" logic to its own well-defined logic in the future.

Describe the solution you'd like
Remove task pipeline's dependency on IdealStates.