Automatic merge from submit-queue (batch tested with PRs 49342, 50581, 50777)
Update RegisterMandatoryFitPredicate to avoid double register.
**What this PR does / why we need it**:
In https://github.com/kubernetes/kubernetes/pull/50362 , we introduced `RegisterMandatoryFitPredicate` to make some predicates always included by scheduler. This PRs is to improve it by avoiding double register: `RegisterFitPredicate` and `RegisterMandatoryFitPredicate`
**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes#50360
**Release note**:
```release-note
None
```
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