chore: update deploy to use EKS (#23084)

.github/workflows/deploy.yaml

@@ -61,7 +61,7 @@ jobs:
     if: needs.should-deploy.outputs.verdict == 'DEPLOY'
     permissions:
       contents: read
-      id-token: write
+      id-token: write # to authenticate to EKS cluster
       packages: write # to retag image as dogfood
     steps:
       - name: Harden Runner
@@ -82,27 +82,23 @@ jobs:
           username: ${{ github.actor }}
           password: ${{ secrets.GITHUB_TOKEN }}
 
-      - name: Authenticate to Google Cloud
-        uses: google-github-actions/auth@7c6bc770dae815cd3e89ee6cdf493a5fab2cc093 # v3.0.0
+      - name: Configure AWS Credentials
+        uses: aws-actions/configure-aws-credentials@8df5847569e6427dd6c4fb1cf565c83acfa8afa7 # v6.0.0
         with:
-          workload_identity_provider: ${{ vars.GCP_WORKLOAD_ID_PROVIDER }}
-          service_account: ${{ vars.GCP_SERVICE_ACCOUNT }}
+          role-to-assume: ${{ vars.AWS_DOGFOOD_DEPLOY_ROLE }}
+          aws-region: ${{ vars.AWS_DOGFOOD_DEPLOY_REGION }}
 
-      - name: Set up Google Cloud SDK
-        uses: google-github-actions/setup-gcloud@aa5489c8933f4cc7a4f7d45035b3b1440c9c10db # v3.0.1
+      - name: Get Cluster Credentials
+        run: aws eks update-kubeconfig --name "$AWS_DOGFOOD_CLUSTER_NAME" --region "$AWS_DOGFOOD_DEPLOY_REGION"
+        env:
+          AWS_DOGFOOD_CLUSTER_NAME: ${{ vars.AWS_DOGFOOD_CLUSTER_NAME }}
+          AWS_DOGFOOD_DEPLOY_REGION: ${{ vars.AWS_DOGFOOD_DEPLOY_REGION }}
 
       - name: Set up Flux CLI
         uses: fluxcd/flux2/action@8454b02a32e48d775b9f563cb51fdcb1787b5b93 # v2.7.5
         with:
           # Keep this and the github action up to date with the version of flux installed in dogfood cluster
-          version: "2.7.0"
-
-      - name: Get Cluster Credentials
-        uses: google-github-actions/get-gke-credentials@3da1e46a907576cefaa90c484278bb5b259dd395 # v3.0.0
-        with:
-          cluster_name: dogfood-v2
-          location: us-central1-a
-          project_id: coder-dogfood-v2
+          version: "2.8.2"
 
       # Retag image as dogfood while maintaining the multi-arch manifest
       - name: Tag image as dogfood