/kind feature

MPI Operator now supports the all-or-nothing semantic, queuing logic, and more features for batch workload by the Volcano.
Although, I think the maintenance cost for Volcano is a bit high for users who want to use only all-or-nothing semantic.

So I would like to support that semantic by coscheduling plugin.

Supporting the coscheduling plugin, users could use that semantic without additional components.

@alculquicondor @gaocegege @terrytangyuan @zw0610 WDYT?

Tasks:

• Implement the logic to support the coscheduling plugin
• Add E2E for gang-scheduling using the scheduler plugins