Merge pull request #60753 from resouer/equiv-hash

Automatic merge from submit-queue (batch tested with PRs 60898, 60912, 60753, 61002, 60796). If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

Revert revert of equivalence class hash calculation in scheduler

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

NOTE: This is a revert revert of https://github.com/kubernetes/kubernetes/pull/58555

But since the original PR has been changed, I have to copy the original changes and resend this new PR. See: https://github.com/kubernetes/kubernetes/pull/58555#issuecomment-364345972

And I kept @misterikkit 's change as the first commit (by co-author feature of github) in the history. 

We decide to do revert revert because #58989 has been fixed, which should help to improve the time consumed by integration test.

**But** we should still pay attention to integration tests to see if there's frequent timeout happen.

**Special notes for your reviewer**:

**Release note**:

```release-note
Improve equivalence class hash calculation in scheduler
```

pkg/scheduler/algorithmprovider/defaults/defaults.go

@@ -77,13 +77,6 @@ func init() {
 	// Fit is determined by node selector query.
 	factory.RegisterFitPredicate(predicates.MatchNodeSelectorPred, predicates.PodMatchNodeSelector)
 
-	// Use equivalence class to speed up heavy predicates phase.
-	factory.RegisterGetEquivalencePodFunction(
-		func(args factory.PluginFactoryArgs) algorithm.GetEquivalencePodFunc {
-			return predicates.NewEquivalencePodGenerator(args.PVCInfo)
-		},
-	)
-
 	// ServiceSpreadingPriority is a priority config factory that spreads pods by minimizing
 	// the number of pods (belonging to the same service) on the same node.
 	// Register the factory so that it's available, but do not include it as part of the default priorities