Add GitHub Actions workflow for GKE deployment

[Kee Nexora (nexoracontrol-ops)]

This workflow builds a Docker container, publishes it to Google Container Registry, and deploys it to GKE on push to the 'main' branch. It includes steps for authentication, Docker image building, and deployment configuration.

[microsoft-github-policy-service]

Kee Nexora (@nexoracontrol-ops) please read the following Contributor License Agreement(CLA). If you agree with the CLA, please reply with the following information.

@microsoft-github-policy-service agree [company="{your company}"]

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@microsoft-github-policy-service agree

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@microsoft-github-policy-service agree company="Microsoft"

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