Update the Kubernetes image used in the helm pre-delete-hook to 1.23.

[roberthbailey]

What type of PR is this?

Uncomment only one /kind <> line, press enter to put that in a new line, and remove leading whitespace from that line:

/kind breaking
/kind bug

/kind cleanup

/kind documentation
/kind feature
/kind hotfix

What this PR does / Why we need it.
I missed this step in my large pull request to update to Kubernetes 1.23.

Which issue(s) this PR fixes:

Part of #2642

Special notes for your reviewer:

[agones-bot]

Build Succeeded 👏

Build Id: 2e590eae-3bae-4980-b0c3-da74c92f2292

The following development artifacts have been built, and will exist for the next 30 days:

• image: us-docker.pkg.dev/agones-images/ci/agones-controller:1.26.0-ae8daf5-amd64
• image: us-docker.pkg.dev/agones-images/ci/agones-sdk:1.26.0-ae8daf5-linux-amd64
• image: us-docker.pkg.dev/agones-images/ci/agones-ping:1.26.0-ae8daf5-amd64
• image: us-docker.pkg.dev/agones-images/ci/agones-allocator:1.26.0-ae8daf5-amd64
• Linux C++ SDK (build): agonessdk-1.26.0-ae8daf5-amd64-linux-arch_64.tar.gz
• SDK Server: agonessdk-server-1.26.0-ae8daf5-amd64.zip

A preview of the website (the last 30 builds are retained):

• https://ae8daf5-dot-preview-dot-agones-images.appspot.com/

To install this version:

• git fetch https://github.com/googleforgames/agones.git pull/2717/head:pr_2717 && git checkout pr_2717
• helm install agones ./install/helm/agones --namespace agones-system --set agones.image.tag=1.26.0-ae8daf5-amd64

[google-oss-prow]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: markmandel, roberthbailey

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• OWNERS [markmandel,roberthbailey]

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