fix: migrate k8s package key issue

Author: andyzhangx

Diff for: pkg/blobfuse-proxy/install-proxy.sh

@@ -33,6 +33,11 @@ then
   else
     cp /blobfuse-proxy/packages-microsoft-prod-22.04.deb /host/etc/packages-microsoft-prod.deb
   fi
+
+  # https://kubernetes.io/blog/2023/08/15/pkgs-k8s-io-introduction/#how-to-migrate
+  echo "deb [signed-by=/etc/apt/keyrings/kubernetes-apt-keyring.gpg] https://pkgs.k8s.io/core:/stable:/v1.30/deb/ /" | tee /host/etc/apt/sources.list.d/kubernetes.list
+  $HOST_CMD curl -fsSL https://pkgs.k8s.io/core:/stable:/v1.30/deb/Release.key | $HOST_CMD gpg --dearmor -o /etc/apt/keyrings/kubernetes-apt-keyring.gpg
+
   # when running dpkg -i /etc/packages-microsoft-prod.deb, need to enter y to continue. 
   # refer to https://stackoverflow.com/questions/45349571/how-to-install-deb-with-dpkg-non-interactively
   yes | $HOST_CMD dpkg -i /etc/packages-microsoft-prod.deb && $HOST_CMD apt update