[proposal] elastic quota plugin support job-level preemption

[xulinfei1996]

What is your proposal:
koord-scheduler supports jobwise preemtption.

Why is this needed:
In a large scale shared-cluster, some quotas may be very busy, some quotas may be idle. If the idle resources can be shared in some way, the resource utilization rate of the cluster will be significantly improved. Moreover, even in one quota, there are some production jobs and develop jobs, user may expect production jobs can preempt develop jobs when resource is busy.

If the pods belongs to a job , we should also consider resource assign\preemption by job level.
Is there a suggested solution, if so, please add it:

[eahydra]

proposal is here #1879

[songtao98]

/assign @ZiMengSheng