Merge pull request #66840 from janetkuo/job-ttl

Automatic merge from submit-queue (batch tested with PRs 66840, 68159). If you want to cherry-pick this change to another branch, please follow the instructions here: https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md.

TTL for cleaning up Jobs after they finish

**What this PR does / why we need it**: kubernetes/enhancements#592

**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 #64470 
For kubernetes/enhancements#592

**Special notes for your reviewer**: @kubernetes/sig-apps-pr-reviews 

**Release note**:

```release-note
Add a TTL machenism to clean up Jobs after they finish.
```

Kubernetes-commit: c50a3471242fa33a111d493711c3477e691ccdea

config/v1alpha1/types.go

@@ -145,6 +145,9 @@ type KubeControllerManagerConfiguration struct {
 	// ServiceControllerConfiguration holds configuration for ServiceController
 	// related features.
 	ServiceController ServiceControllerConfiguration
+	// TTLAfterFinishedControllerConfiguration holds configuration for
+	// TTLAfterFinishedController related features.
+	TTLAfterFinishedController TTLAfterFinishedControllerConfiguration
 }
 
 // GenericControllerManagerConfiguration holds configuration for a generic controller-manager.
@@ -438,3 +441,10 @@ type ServiceControllerConfiguration struct {
 	// management, but more CPU (and network) load.
 	ConcurrentServiceSyncs int32
 }
+
+// TTLAfterFinishedControllerConfiguration contains elements describing TTLAfterFinishedController.
+type TTLAfterFinishedControllerConfiguration struct {
+	// concurrentTTLSyncs is the number of TTL-after-finished collector workers that are
+	// allowed to sync concurrently.
+	ConcurrentTTLSyncs int32
+}