[Umbrella] Flink Support (Help Wanted)

### Code of Conduct

- [X] I agree to follow this project's [Code of Conduct](https://www.apache.org/foundation/policies/conduct)

### Search before asking

- [X] I have searched in the [issues](https://github.com/apache/incubator-uniffle/issues) and found no similar issues.

### Describe the proposal

Flink Support is complex topic. We set up an issue here. In Flink Community,
Flink Shuffle will have much change because of https://cwiki.apache.org/confluence/display/FLINK/FLIP-301%3A+Hybrid+Shuffle+supports+Remote+Storage.
We should discuss actively with Flink community.
Their discussion thread
https://lists.apache.org/thread/nwrqd5jtqwks89tbxpcrgto6r2bhdhno

### Task list

xx

### Are you willing to submit PR?

- [ ] Yes I am willing to submit a PR!