Merge pull request #64316 from krzysied/scheduling_latency_metric

Automatic merge from submit-queue (batch tested with PRs 63328, 64316, 64444, 64449, 64453). 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>.

Fixing scheduling latency metrics

**What this PR does / why we need it**:
Allows to measure and to display scheduling latency metrics during tests. Provides new functionality of resetting scheduler latency metrics.

**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 #63493

**Special notes for your reviewer**:
E2eSchedulingLatency, SchedulingAlgorithmLatency, BindingLatency are now available 
as subtypes of OperationLatency.

**Release note**:

```release-note
NONE
```

test/e2e/scalability/density.go

@@ -395,8 +395,6 @@ var _ = SIGDescribe("Density", func() {
 		}
 
 		// Verify scheduler metrics.
-		// TODO: Reset metrics at the beginning of the test.
-		// We should do something similar to how we do it for APIserver.
 		latency, err := framework.VerifySchedulerLatency(c)
 		framework.ExpectNoError(err)
 		if err == nil {
@@ -442,6 +440,7 @@ var _ = SIGDescribe("Density", func() {
 
 		uuid = string(utiluuid.NewUUID())
 
+		framework.ExpectNoError(framework.ResetSchedulerMetrics(c))
 		framework.ExpectNoError(framework.ResetMetrics(c))
 		framework.ExpectNoError(os.Mkdir(fmt.Sprintf(framework.TestContext.OutputDir+"/%s", uuid), 0777))