Fix gke e2e tests

set USE_GKE_GCLOUD_AUTH_PLUGIN to true before getting credentials from gke

.github/workflows/gke.yml

@@ -53,7 +53,6 @@ jobs:
         uses: google-github-actions/setup-gcloud@v1
         with:
           install_components: 'gke-gcloud-auth-plugin'
-
       -
         name: Install gcloud kubectl version
         run: gcloud components install kubectl
@@ -74,6 +73,8 @@ jobs:
           --zone ${{ env.GKE_ZONE }}
       -
         name: Get kubeconfig file from GKE
+        env:
+          USE_GKE_GCLOUD_AUTH_PLUGIN: True
         run: |
           id="${{ steps.create-cluster.outputs.ID }}"
           gcloud container clusters get-credentials fleetci$id --zone ${{ env.GKE_ZONE }} --project ${{ secrets.CI_GOOGLE_PROJECT }}
@@ -149,6 +150,7 @@ jobs:
           GIT_REPO_USER: "git"
           CI_OCI_USERNAME:  ${{ secrets.CI_OCI_USERNAME }}
           CI_OCI_PASSWORD:  ${{ secrets.CI_OCI_PASSWORD }}
+          USE_GKE_GCLOUD_AUTH_PLUGIN: True
         run: |
           export GIT_SSH_KEY="$GITHUB_WORKSPACE/id_ecdsa"
           export GIT_SSH_PUBKEY="$GITHUB_WORKSPACE/id_ecdsa.pub"