Automatic merge from submit-queue (batch tested with PRs 59424, 59672, 59313, 59661). 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: Bump GLBC version to 0.9.8-alpha.1

**What this PR does / why we need it**:
Soak on an alpha version of GLBC 0.9.8


**Special notes for your reviewer**:
/assign @bowei 
/cc @bowei 

**Release note**:
Release note will be set when we update this to stable 0.9.8. 
```release-note
NONE
```