SDK Conformance: Use -test consistently instead of -no-build

[zmerlynn]

Not clear why these were using -no-build. Using -test gives us retries and nice reporting.

Helping #3310

[agones-bot]

Build Succeeded 👏

Build Id: fd44cfa5-cf2e-4265-88b6-634a85f1e2fa

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:1.35.0-dev-98d1c0d-amd64
• image: us-docker.pkg.dev/agones-images/ci/agones-extensions:1.35.0-dev-98d1c0d-amd64
• image: us-docker.pkg.dev/agones-images/ci/agones-sdk:1.35.0-dev-98d1c0d-linux-amd64
• image: us-docker.pkg.dev/agones-images/ci/agones-ping:1.35.0-dev-98d1c0d-amd64
• image: us-docker.pkg.dev/agones-images/ci/agones-allocator:1.35.0-dev-98d1c0d-amd64
• Linux C++ SDK (build): agonessdk-1.35.0-dev-98d1c0d-amd64-linux-arch_64.tar.gz
• SDK Server: agonessdk-server-1.35.0-dev-98d1c0d-amd64.zip

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

• https://98d1c0d-dot-preview-dot-agones-images.appspot.com/

To install this version:

• git fetch https://github.com/googleforgames/agones.git pull/3340/head:pr_3340 && git checkout pr_3340
• helm install agones ./install/helm/agones --namespace agones-system --set agones.image.registry=us-docker.pkg.dev/agones-images/ci --set agones.image.tag=1.35.0-dev-98d1c0d-amd64

[markmandel]

Compared times with another build, and both are around 4m. Let's do it.

[google-oss-prow]

[APPROVALNOTIFIER] This PR is APPROVED

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

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