Merge pull request #55897 from juanvallejo/jvallejo/expose-backoff-and-limiter-rest-request

Automatic merge from submit-queue (batch tested with PRs 55642, 55897, 55835, 55496, 55313). 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>.

add rest/request backoffMgr and throttle setters

**Release note**:
```release-note
NONE
```

Allows modifications to be made to a request's rate-limiter and backoff manager
from a `RequestOptions` func introduced in https://github.com/kubernetes/kubernetes/pull/55834

Depends on https://github.com/kubernetes/kubernetes/pull/55834

@enj @smarterclayton

staging/src/k8s.io/client-go/rest/request.go

@@ -179,6 +179,24 @@ func (r *Request) Resource(resource string) *Request {
 	return r
 }
 
+// BackOff sets the request's backoff manager to the one specified,
+// or defaults to the stub implementation if nil is provided
+func (r *Request) BackOff(manager BackoffManager) *Request {
+	if manager == nil {
+		r.backoffMgr = &NoBackoff{}
+		return r
+	}
+
+	r.backoffMgr = manager
+	return r
+}
+
+// Throttle receives a rate-limiter and sets or replaces an existing request limiter
+func (r *Request) Throttle(limiter flowcontrol.RateLimiter) *Request {
+	r.throttle = limiter
+	return r
+}
+
 // SubResource sets a sub-resource path which can be multiple segments segment after the resource
 // name but before the suffix.
 func (r *Request) SubResource(subresources ...string) *Request {