update go version to 1.21.12

[ashutosji]

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
/kind release

What this PR does / Why we need it:

Which issue(s) this PR fixes:#3892, #3903, #3901

Closes #3892, #3903, #3901

Special notes for your reviewer:

[ashutosji]

The make cloud-build command has succeeded for all the necessary example images in my project and i have pushed all those images in my artifact registry.
The go.mod and go.sum files need not to be updated as this is a patch version update.

Once, this build succeed please let me know if i can push these images on prod. I will update these new images link to everywhere.

[agones-bot]

Build Succeeded 👏

Build Id: 40f2ed55-16c2-4841-8d4b-5b4e6a6d59f8

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:1.42.0-dev-1b52e62-amd64
• image: us-docker.pkg.dev/agones-images/ci/agones-extensions:1.42.0-dev-1b52e62-amd64
• image: us-docker.pkg.dev/agones-images/ci/agones-sdk:1.42.0-dev-1b52e62-linux-amd64
• image: us-docker.pkg.dev/agones-images/ci/agones-ping:1.42.0-dev-1b52e62-amd64
• image: us-docker.pkg.dev/agones-images/ci/agones-allocator:1.42.0-dev-1b52e62-amd64
• Linux C++ SDK (build): agonessdk-1.42.0-dev-1b52e62-amd64-linux-arch_64.tar.gz
• SDK Server: agonessdk-server-1.42.0-dev-1b52e62-amd64.zip

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

• https://1b52e62-dot-preview-dot-agones-images.appspot.com/

To install this version:

• git fetch https://github.com/googleforgames/agones.git pull/3894/head:pr_3894 && git checkout pr_3894
• helm install agones ./install/helm/agones --namespace agones-system --set agones.image.registry=us-docker.pkg.dev/agones-images/ci --set agones.image.tag=1.42.0-dev-1b52e62-amd64

[ashutosji]

My bad, I could have created this PR as a draft.

[igooch]

I updated the original issue to include the steps from the golang_version_upgrade template. It looks like there's a couple files that will need to be updated. If you run through the steps in the issue that will resolve the few outstanding items. Otherwise looks good!

    modified:   examples/allocation-endpoint/server/Dockerfile
    modified:   go.mod
    modified:   site/go.mod
    modified:   site/go.sum

[ashutosji]

I updated the original issue to include the steps from the golang_version_upgrade template. It looks like there's a couple files that will need to be updated. If you run through the steps in the issue that will resolve the few outstanding items. Otherwise looks good!

    modified:   examples/allocation-endpoint/server/Dockerfile
    modified:   go.mod
    modified:   site/go.mod
    modified:   site/go.sum

Thank you so much for your guidance!
The absence of relevant images in the prod will cause this PR to fail.

As we already tested this with a previous commit, everything works perfectly with my own images. Allow me to push these images to prod.

[agones-bot]

Build Failed 😱

Build Id: fb47c1a4-005e-4775-b0c7-5014c75c94d8

• Cloud Build view
• Cloud Build log download

To get permission to view the Cloud Build view, join the agones-discuss Google Group.

[agones-bot]

Build Succeeded 👏

Build Id: cd3ff9e5-afa6-4071-a6bd-49c2da997d8e

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:1.42.0-dev-88d05eb-amd64
• image: us-docker.pkg.dev/agones-images/ci/agones-extensions:1.42.0-dev-88d05eb-amd64
• image: us-docker.pkg.dev/agones-images/ci/agones-sdk:1.42.0-dev-88d05eb-linux-amd64
• image: us-docker.pkg.dev/agones-images/ci/agones-ping:1.42.0-dev-88d05eb-amd64
• image: us-docker.pkg.dev/agones-images/ci/agones-allocator:1.42.0-dev-88d05eb-amd64
• Linux C++ SDK (build): agonessdk-1.42.0-dev-88d05eb-amd64-linux-arch_64.tar.gz
• SDK Server: agonessdk-server-1.42.0-dev-88d05eb-amd64.zip

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

• https://88d05eb-dot-preview-dot-agones-images.appspot.com/

To install this version:

• git fetch https://github.com/googleforgames/agones.git pull/3894/head:pr_3894 && git checkout pr_3894
• helm install agones ./install/helm/agones --namespace agones-system --set agones.image.registry=us-docker.pkg.dev/agones-images/ci --set agones.image.tag=1.42.0-dev-88d05eb-amd64

[igooch]

LGTM