Merge pull request #61002 from FengyunPan2/fix-isNotFound

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>.

IsNotFound should check ErrDefault404 and ErrUnexpectedResponseCode

Related to: #60658 #60976
Refer to:
 https://github.com/gophercloud/gophercloud/pull/103/files#diff-e8ad71423a1527851f282515739eecc2R265

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

pkg/cloudprovider/providers/openstack/openstack.go

@@ -602,8 +602,17 @@ func (os *OpenStack) LoadBalancer() (cloudprovider.LoadBalancer, bool) {
 }
 
 func isNotFound(err error) bool {
-	e, ok := err.(*gophercloud.ErrUnexpectedResponseCode)
-	return ok && e.Actual == http.StatusNotFound
+	if _, ok := err.(gophercloud.ErrDefault404); ok {
+		return true
+	}
+
+	if errCode, ok := err.(gophercloud.ErrUnexpectedResponseCode); ok {
+		if errCode.Actual == http.StatusNotFound {
+			return true
+		}
+	}
+
+	return false
 }
 
 // Zones indicates that we support zones