Delete List Value(s) on Game Server Allocation

[igooch]

What type of PR is this?

/kind feature

What this PR does / Why we need it:

Adds the ability to delete value(s) from a List during game server allocation.

Which issue(s) this PR fixes:

Closes #4003

Special notes for your reviewer:

Commits have been broken out into the different parts of this PR. Follows the existing code for AddValues during game server allocation.

[agones-bot]

Build Failed 😭

Build Id: 47d4b269-fe90-4424-9b8f-6ba839d0acac

Status: FAILURE

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[agones-bot]

Build Failed 😭

Build Id: f2a8871d-a4e1-4bef-8389-61062455862c

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[agones-bot]

Build Failed 😭

Build Id: 17830196-457e-46df-879e-edf90781c394

Status: FAILURE

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[agones-bot]

Build Succeeded 🥳

Build Id: f5386a51-2f6c-47e1-a361-6c23e4d77a5b

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:1.46.0-dev-9786b90
• image: us-docker.pkg.dev/agones-images/ci/agones-extensions:1.46.0-dev-9786b90
• image: us-docker.pkg.dev/agones-images/ci/agones-sdk:1.46.0-dev-9786b90-linux
• image: us-docker.pkg.dev/agones-images/ci/agones-ping:1.46.0-dev-9786b90
• image: us-docker.pkg.dev/agones-images/ci/agones-allocator:1.46.0-dev-9786b90
• Linux C++ SDK (build): agonessdk-1.46.0-dev-9786b90-linux-arch_64.tar.gz
• SDK Server: agonessdk-server-1.46.0-dev-9786b90.zip

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

• https://9786b90-dot-preview-dot-agones-images.appspot.com/

To install this version:

git fetch https://github.com/googleforgames/agones.git pull/4054/head:pr_4054 && git checkout pr_4054
helm install agones ./install/helm/agones --namespace agones-system --set agones.image.registry=us-docker.pkg.dev/agones-images/ci --set agones.image.tag=1.46.0-dev-9786b90

[agones-bot]

Build Succeeded 🥳

Build Id: 92ea4d8f-27a0-4c0c-830b-88af543ded89

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:1.46.0-dev-730ac2c
• image: us-docker.pkg.dev/agones-images/ci/agones-extensions:1.46.0-dev-730ac2c
• image: us-docker.pkg.dev/agones-images/ci/agones-sdk:1.46.0-dev-730ac2c-linux
• image: us-docker.pkg.dev/agones-images/ci/agones-ping:1.46.0-dev-730ac2c
• image: us-docker.pkg.dev/agones-images/ci/agones-allocator:1.46.0-dev-730ac2c
• Linux C++ SDK (build): agonessdk-1.46.0-dev-730ac2c-linux-arch_64.tar.gz
• SDK Server: agonessdk-server-1.46.0-dev-730ac2c.zip

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

• https://730ac2c-dot-preview-dot-agones-images.appspot.com/

To install this version:

git fetch https://github.com/googleforgames/agones.git pull/4054/head:pr_4054 && git checkout pr_4054
helm install agones ./install/helm/agones --namespace agones-system --set agones.image.registry=us-docker.pkg.dev/agones-images/ci --set agones.image.tag=1.46.0-dev-730ac2c

[gongmax]

LGTM, some minor comments

[agones-bot]

Build Failed 😭

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Status: FAILURE

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[agones-bot]

Build Failed 😭

Build Id: 1dccaa11-64ab-4970-8e74-61d1a96c009f

Status: FAILURE

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[agones-bot]

Build Failed 😭

Build Id: ab299876-0f03-4d59-833c-a8a69dbdf787

Status: FAILURE

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[agones-bot]

Build Succeeded 🥳

Build Id: 180054e6-2378-4201-b5fa-5934a1d99178

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:1.46.0-dev-d9186e0
• image: us-docker.pkg.dev/agones-images/ci/agones-extensions:1.46.0-dev-d9186e0
• image: us-docker.pkg.dev/agones-images/ci/agones-sdk:1.46.0-dev-d9186e0-linux
• image: us-docker.pkg.dev/agones-images/ci/agones-ping:1.46.0-dev-d9186e0
• image: us-docker.pkg.dev/agones-images/ci/agones-allocator:1.46.0-dev-d9186e0
• Linux C++ SDK (build): agonessdk-1.46.0-dev-d9186e0-linux-arch_64.tar.gz
• SDK Server: agonessdk-server-1.46.0-dev-d9186e0.zip

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

• https://d9186e0-dot-preview-dot-agones-images.appspot.com/

To install this version:

git fetch https://github.com/googleforgames/agones.git pull/4054/head:pr_4054 && git checkout pr_4054
helm install agones ./install/helm/agones --namespace agones-system --set agones.image.registry=us-docker.pkg.dev/agones-images/ci --set agones.image.tag=1.46.0-dev-d9186e0