[Improvement] Partition reassignment improvements tracking

Now, partition reassign has been applied into the large scale uniffle cluster, that is effective to speed up the backpressure of shuffle-server and huge partition.

This issue is to track the following partition reassign improvements

- [ ] #2532
- [ ] #2595

Start by reading the linked issues #2532 and #2595, since this issue only tracks their partition-reassignment improvements. Confirm the scope and dependencies of both items; the tracking work is done when the listed improvements are completed and the checklist is resolved.

Written by the indexing model from the issue text.