Automatic merge from submit-queue (batch tested with PRs 67986, 68210, 67817). 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.
add mixed protocol support for azure load balancer
**What this PR does / why we need it**:
If user specify `service.beta.kubernetes.io/azure-load-balancer-mixed-protocols: "true"`, azure cloud provider will create both TCP and UDP lb rules, for more details, could refer to https://github.com/kubernetes/kubernetes/issues/66887
**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#66887
**Special notes for your reviewer**:
original `reconcileLoadBalancer` func is too big, I move part of code implementation to a standalone func `createLoadBalancerRule`
example service config:
```
apiVersion: v1
kind: Service
metadata:
annotations:
service.beta.kubernetes.io/azure-load-balancer-mixed-protocols: "true"
name: web
namespace: default
spec:
ports:
- port: 80
protocol: TCP
targetPort: 80
selector:
app: web
sessionAffinity: None
type: LoadBalancer
```
**Release note**:
```
add mixed protocol support for azure load balancer
```
/kind feature
/sig azure
/assign @feiskyer @khenidak
771bb86fa1