Automatic merge from submit-queue (batch tested with PRs 66121, 66140, 66045). 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>.
Support setting azure LB idle timeout
**What this PR does / why we need it**:
Adds a new annotation to allow users to configure the idle timeout of
the Azure LB.
**Release note**:
```release-note
Support configuring the Azure load balancer idle connection timeout for services
```
16c5ba4114