[Improvement] [coordinator]dynamic assign strategy server num by shuffle partition num

### 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?q=is%3Aissue) and found no similar issues.

### What would you like to be improved?

assgin shuffle server num by shuffle partition num.
[PartitionBalanceAssignmentStrategy.java](https://github.com/apache/incubator-uniffle/blob/master/coordinator/src/main/java/org/apache/uniffle/coordinator/strategy/assignment/PartitionBalanceAssignmentStrategy.java)

### How should we improve?

_No response_