Fix kind on GameServerAllocation converter

[pooneh-m]

What type of PR is this?

/kind bug

What this PR does / Why we need it:
Kind was not correctly set for "GameServerAllocation" on gRPC to GameServerAllocation response converter.

Which issue(s) this PR fixes:
Closes #1864

Special notes for your reviewer:

[agones-bot]

Build Succeeded 👏

Build Id: 0af32197-4c04-4a1d-9052-9400d99db911

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

• image: gcr.io/agones-images/agones-controller:1.10.0-1eed5a1
• image: gcr.io/agones-images/agones-sdk:1.10.0-1eed5a1
• image: gcr.io/agones-images/agones-ping:1.10.0-1eed5a1
• Linux C++ SDK (build): agonessdk-1.10.0-1eed5a1-linux-arch_64.tar.gz
• SDK Server: agonessdk-server-1.10.0-1eed5a1.zip

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

• https://1eed5a1-dot-preview-dot-agones-images.appspot.com/

To install this version:

• git fetch https://github.com/googleforgames/agones.git pull/1876/head:pr_1876 && git checkout pr_1876
• helm install ./install/helm/agones --namespace agones-system --name agones --set agones.image.tag=1.10.0-1eed5a1

[agones-bot]

Build Succeeded 👏

Build Id: 6bdef3f0-2f27-45d5-aa24-b899392b6a10

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

• image: gcr.io/agones-images/agones-controller:1.10.0-e595c3a
• image: gcr.io/agones-images/agones-sdk:1.10.0-e595c3a
• image: gcr.io/agones-images/agones-ping:1.10.0-e595c3a
• Linux C++ SDK (build): agonessdk-1.10.0-e595c3a-linux-arch_64.tar.gz
• SDK Server: agonessdk-server-1.10.0-e595c3a.zip

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

• https://e595c3a-dot-preview-dot-agones-images.appspot.com/

To install this version:

• git fetch https://github.com/googleforgames/agones.git pull/1876/head:pr_1876 && git checkout pr_1876
• helm install ./install/helm/agones --namespace agones-system --name agones --set agones.image.tag=1.10.0-e595c3a

[aLekSer]

Nice fix.

[google-oss-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: aLekSer, pooneh-m

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• OWNERS [aLekSer,pooneh-m]

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