Flake: TestControllerWatchGameServers

[markmandel]

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:

Pretty sure there was a panic because a feature flag flipped in the middle of the test, resulting a not fully initialised Allocation Overflow controller.

I believe this will resolve the issue. Either way it doesn't hurt.

Which issue(s) this PR fixes:

Saw the flake in #3532

Special notes for your reviewer:

N/A

[agones-bot]

Build Succeeded 👏

Build Id: d49e89b7-2517-4b95-bae2-11712941ab8d

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:1.37.0-dev-b2283e3-amd64
• image: us-docker.pkg.dev/agones-images/ci/agones-extensions:1.37.0-dev-b2283e3-amd64
• image: us-docker.pkg.dev/agones-images/ci/agones-sdk:1.37.0-dev-b2283e3-linux-amd64
• image: us-docker.pkg.dev/agones-images/ci/agones-ping:1.37.0-dev-b2283e3-amd64
• image: us-docker.pkg.dev/agones-images/ci/agones-allocator:1.37.0-dev-b2283e3-amd64
• Linux C++ SDK (build): agonessdk-1.37.0-dev-b2283e3-amd64-linux-arch_64.tar.gz
• SDK Server: agonessdk-server-1.37.0-dev-b2283e3-amd64.zip

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

• https://b2283e3-dot-preview-dot-agones-images.appspot.com/

To install this version:

• git fetch https://github.com/googleforgames/agones.git pull/3534/head:pr_3534 && git checkout pr_3534
• helm install agones ./install/helm/agones --namespace agones-system --set agones.image.registry=us-docker.pkg.dev/agones-images/ci --set agones.image.tag=1.37.0-dev-b2283e3-amd64