Automatic merge from submit-queue (batch tested with PRs 58784, 62057, 62621, 62652, 62656). 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>.
[GCE] Remove parallel
**What this PR does / why we need it**:
Removes the parallel from the Loadbalancer tests. Looks like one mock method modifies a singleton variable, hence the tests currently cannot be run in parallel.
**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#62601
**Release note**:
```release-note
NONE
```
1d94baad01