make parameters more reasonable

## Feature Request

### Describe your feature request related problem

We have encountered many problems caused by improper parameter adjustment. We must limit the adjustment range of the parameters and give a best practice, remove some useless and do some check.

Such as: `merge-limit=128, region-limit=64, leader-limit=8` the merge limit may influence the leader limit.

### Describe alternatives you've considered

- make the limit do not affect each other
- limit the adjustment range, such as `store limit` should have best practice
- do some check if the user set parameters is unreasonble

### Teachability, Documentation, Adoption, Migration Strategy

- GO