Automatic merge from submit-queue (batch tested with PRs 45813, 49594, 49443, 49167, 47539)

GCE: Adding unit test for ensureStaticIP

**What this PR does / why we need it**:
Entry into unit testing GCE loadbalancer code by testing `ensureStaticIP` which had a bug in 1.7.0.

@bowei @freehan @MrHohn @dnardo @thockin, any thoughts and comments on how we could unit test LB code moving forward? I think there are many areas we can split functions into smaller ones for easier testing - firewallNeedsUpdate being an example of that. However, it seems to me that we still need to mock our GCP calls for some functions that heavily revolve around API calls.  A dream goal would be to have a unit test that can call EnsureLoadBalancer.  Now that we have shared resources between different services and ingresses (firewalls, instance groups, [future features]), being able to setup different scenarios without depending on E2E tests would be awesome. However, I'm not sure how reachable that goal would be. 

Most importantly, let's not make things worse. If you have advice on anti-patterns to avoid, please speak up.

```release-note
NONE
```