Switch to new k8s package repositories

From September 13th the legacy Google-hosted package repositories
will be frozen and all future releases will only be posted to the
new community-owned package repositories at pkgs.k8s.io

packages/e2e/Dockerfile

@@ -10,8 +10,9 @@
 # limitations under the License.
 
 FROM cypress/browsers:node18.12.0-chrome107
-RUN curl -fsSLo /usr/share/keyrings/kubernetes-archive-keyring.gpg https://dl.k8s.io/apt/doc/apt-key.gpg &&\
-    echo "deb [signed-by=/usr/share/keyrings/kubernetes-archive-keyring.gpg] https://apt.kubernetes.io/ kubernetes-xenial main" | tee /etc/apt/sources.list.d/kubernetes.list &&\
+RUN apt-get update && apt-get install -y gnupg &&\
+    curl -fsSL https://pkgs.k8s.io/core:/stable:/v1.28/deb/Release.key | gpg --dearmor -o /usr/share/keyrings/kubernetes-apt-keyring.gpg &&\
+    echo "deb [signed-by=/usr/share/keyrings/kubernetes-apt-keyring.gpg] https://pkgs.k8s.io/core:/stable:/v1.28/deb/ /" | tee /etc/apt/sources.list.d/kubernetes.list &&\
     apt-get update && apt-get install -y \
     kubectl \
     && rm -rf /var/lib/apt/lists/*