Merge pull request #60524 from dims/temp-fix-for-kube-scheduler-leader-election

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Temporary fix for LeaderElect for kube-scheduler

**What this PR does / why we need it**:

kube-controller-manager defaults --leader-elect to true. We should
do the same for kube-scheduler. kube-scheduler used to have this
set to true, but it got lost during refactoring:

efb2bb71cd

**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
Fixes #59729

**Special notes for your reviewer**:

**Release note**:

```release-note
kube-scheduler: restores default leader election behavior. leader-elect command line parameter should "true"
```

cmd/kube-scheduler/app/server.go

@@ -152,6 +152,9 @@ func NewOptions() (*Options, error) {
 		return nil, err
 	}
 
+	// TODO: we should fix this up better (PR 59732)
+	o.config.LeaderElection.LeaderElect = true
+
 	return o, nil
 }