ci: fix the ci canary valut test

use the official way for helm installation
and not use the cdn installation

Signed-off-by: parth-gr <partharora1010@gmail.com>
(cherry picked from commit b4fa906202)

tests/scripts/deploy-validate-vault.sh

@@ -38,11 +38,7 @@ RGW_BUCKET_KEY=mybucketkey
 #############
 
 function install_helm {
-  curl https://baltocdn.com/helm/signing.asc | sudo apt-key add -
-  sudo apt-get install apt-transport-https --yes
-  echo "deb https://baltocdn.com/helm/stable/debian/ all main" | sudo tee /etc/apt/sources.list.d/helm-stable-debian.list
-  sudo apt-get update
-  sudo apt-get install helm
+  curl https://raw.githubusercontent.com/helm/helm/main/scripts/get-helm-3 | bash
 }
 
 if [[ "$(uname)" == "Linux" ]]; then