Can't config `Ranges` for some Schedulers
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severity/minor
type/bug
- Dominant language
- Go
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Description
## Bug Report
There is a problem which can't config `Ranges` for some Schedulers.
Such as `evict-leader`

I will list more schedulers and codes
### What version of PD are you using (`pd-server -V`)?
master
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Assessment
This issue has not been assessed yet.