Upgrade kubectl to 1.22 in dev tooling

[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: Upgrade kubectl for the 1.22 release.

Which issue(s) this PR fixes:

Work on #2494

Special notes for your reviewer:

[agones-bot]

Build Succeeded 👏

Build Id: 10015a66-a482-4462-a56f-98905303ae44

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

• image: gcr.io/agones-images/agones-controller:1.23.0-82840a8
• image: gcr.io/agones-images/agones-ping:1.23.0-82840a8
• Linux C++ SDK (build): agonessdk-1.23.0-82840a8-linux-arch_64.tar.gz
• SDK Server: agonessdk-server-1.23.0-82840a8.zip

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

• https://82840a8-dot-preview-dot-agones-images.appspot.com/

To install this version:

• git fetch https://github.com/googleforgames/agones.git pull/2555/head:pr_2555 && git checkout pr_2555
• helm install ./install/helm/agones --namespace agones-system --name agones --set agones.image.tag=1.23.0-82840a8

[google-oss-prow]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: pooneh-m, roberthbailey

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