E2E: Invert ContainerPortAllocation FeatureGate

[aLekSer]

ContainerPortAllocation now turned on by default, switching it off for E2E tests.

An idea behind is to invert all FeatureGates compared to default values for a second E2E test run.

What type of PR is this?

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/kind breaking
/kind bug
/kind cleanup
/kind documentation
/kind feature
/kind hotfix

What this PR does / Why we need it:

Which issue(s) this PR fixes:

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[markmandel]

That is a very good point! Nice catch!

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[agones-bot]

Build Succeeded 👏

Build Id: 94f67237-6097-4890-b179-1a0cff6f6ef0

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

• image: gcr.io/agones-images/agones-controller:1.7.0-68aee59
• image: gcr.io/agones-images/agones-sdk:1.7.0-68aee59
• image: gcr.io/agones-images/agones-ping:1.7.0-68aee59
• Linux C++ SDK (build): agonessdk-1.7.0-68aee59-linux-arch_64.tar.gz
• SDK Server: agonessdk-server-1.7.0-68aee59.zip

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

• https://68aee59-dot-preview-dot-agones-images.appspot.com/

To install this version:

• git fetch https://github.com/googleforgames/agones.git pull/1652/head:pr_1652 && git checkout pr_1652
• helm install ./install/helm/agones --namespace agones-system --name agones --set agones.image.tag=1.7.0-68aee59