Deregister elb targets before registering targets

[DanielCKennedy]

What type of PR is this?

/kind bug

What this PR does / why we need it:

NLB's with the the max number of targets in a target group are unable to perform node replacements due to "TooManyTargets" errors short-circuiting the ensureTargetGroupTargets() function during registration, preventing the deregister action from happening.

error trying to register targets in target group: \"TooManyTargets: You cannot have more than 1000 targets per network load balancer with cross-zone load balancing enabled.

This change will perform the deregister operation before the register operation to prevent deadlock on NLB's with quota pressure.

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

Fixed bug that prevented target deregistrations from occurring on Load Balancer target groups with quota pressure by processing deregistrations before registrations

[k8s-ci-robot]

This issue is currently awaiting triage.

If cloud-provider-aws contributors determine this is a relevant issue, they will accept it by applying the triage/accepted label and provide further guidance.

The triage/accepted label can be added by org members by writing /triage accepted in a comment.

Details

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.

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by:
Once this PR has been reviewed and has the lgtm label, please assign joelspeed for approval. For more information see the Code Review Process.

The full list of commands accepted by this bot can be found here.

Details

Needs approval from an approver in each of these files:

• OWNERS

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[k8s-ci-robot]

Hi @DanielCKennedy. Thanks for your PR.

I'm waiting for a kubernetes member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

I understand the commands that are listed here.

Details

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.

[kmala]

/ok-to-test

[kmala]

/lgtm