add docs about Network Topology Aware Plugin

[lowang-bh]

/kind feature

docs for PR #3388

Motivation

We target to make scheduler net-topology aware so as to achieve the following:

• best effort to schedule same job to same topology devices, such as same idc, switch.

Goals

• Support single key topology configuration, try to schedule job's all tasks to nodes which have same value with that key
• Support multiple-key topology policies, the key at front get higher score

Non-Goals

• Not to find the global solutions among nodes with all kind values of that key

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[lowang-bh]

/assign @Monokaix @william-wang

[lowang-bh]

close it as there is a more ideal design in https://github.com/volcano-sh/volcano/pull/3850

[JesseStutler]

Hi all! 👋

Network Topology Aware Scheduling is now available in preview! Check out the docs: https://volcano.sh/en/docs/network_topology_aware_scheduling/

Feel free to try it out and let us know what you think in slack, wechat or github issues 🚀