If promoting member fails, remove the unstable member

[HirazawaUi]

This is a follow up to Issue #3152 and PR kubernetes/kubernetes#130782

During the fix for the above issue, we found this problem. However, since it falls outside the scope of the original issue, it was not addressed in the same PR.

ref: kubernetes/kubernetes#130782 (comment)

Though we have never seen this issue reported, this change could serve as a defensive programming measure...

[HirazawaUi]

I'm opening a separate issue to track this problem, just want me won't forget about it.

/assign @BernardMC

Assigning this to you since you previously wanted to fix it. If you don't have bandwidth or find this issue not worth fixing, feel free to unassign.

[k8s-ci-robot]

@HirazawaUi: GitHub didn't allow me to assign the following users: BernardMC.

Note that only kubernetes members with read permissions, repo collaborators and people who have commented on this issue/PR can be assigned. Additionally, issues/PRs can only have 10 assignees at the same time.
For more information please see the contributor guide

In response to this:

I'm opening a separate issue to track this problem, just want me won't forget about it.

/assign @BernardMC

Assigning this to you since you previously wanted to fix it. If you don't have bandwidth or find this issue not worth fixing, feel free to unassign.

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository.

[neolit123]

During the fix for the above issue, we found this problem

best to link to exact comment.

[HirazawaUi]

During the fix for the above issue, we found this problem

best to link to exact comment.

Link added.