Automatic merge from submit-queue (batch tested with PRs 48139, 48042, 47645, 48054, 48003)

Pipe clusterID into gce_loadbalancer_external.go

**What this PR does / why we need it**: Small cleanup for GCE ELB codes.

**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes #48002

**Special notes for your reviewer**:

**Release note**:

```release-note
NONE
```