[proposal] improve coscheduling's log

[eahydra]

What is your proposal:

The logs of CoScheduling Plugin needs to be optimized to remove unnecessary interference.

E.g.,

koordinator/pkg/scheduler/plugins/coscheduling/core/gang.go

Lines 189 to 196 in bdaf284

	klog.Errorf("podGroup's annotation totalNumber illegal, gangName: %v, value: %v",
	gang.Name, pg.Annotations[extension.AnnotationGangTotalNum])
	totalChildrenNum = int64(minRequiredNumber)
	} else if totalChildrenNum != 0 && totalChildrenNum < int64(minRequiredNumber) {
	klog.Errorf("podGroup's annotation totalNumber cannot less than minRequiredNumber, gangName:%v, totalNumber: %v,minRequiredNumber: %v",
	gang.Name, pg.Annotations[extension.AnnotationGangTotalNum], minRequiredNumber)
	totalChildrenNum = int64(minRequiredNumber)
	}

Why is this needed:

Is there a suggested solution, if so, please add it:

[googs1025]

/assign

[googs1025]

Hello, could you please tell me more details? Is it about adjusting the log level and removing unnecessary log outputs?

[googs1025]

@eahydra should we use klog.V(4).ErrorS(), This ensures log level printing and also reflects error messages