[Umbrella] YuniKorn: Support App Service Level Objectives (SLO)

We want to enhance YuniKorn's capability to support Service Level Objectives (SLOs) for critical applications, particularly in scenarios where the cluster has limited resources. 
YuniKorn will be responsible for monitoring the real-time status of applications and dynamically adjust resources, priority, etc to align with the applications' SLOs.

Here is initial proposal https://docs.google.com/document/d/1c8tzmEgl32o6_0eDxQ1ZiMRcD-1QRvdu-3PABNZQX30/edit#heading=h.nkwxxppm7zbd feature 2.

We had some discussions with the community during meetup on 04/03/24 and received valuable insights and suggestions.

Moving forward, we will create a design doc with more details.

cc wilfreds ccondit (I will add others who involved in today's discussion)