Use curl silent/show-error options on Auto DevOps

Signed-off-by: Takuya Noguchi <takninnovationresearch@gmail.com>

changelogs/unreleased/58781-silent-progress-in-auto-devops.yml

+---
+title: Use curl silent/show-error options on Auto DevOps
+merge_request: 25954
+author: Takuya Noguchi
+type: other

lib/gitlab/ci/templates/Auto-DevOps.gitlab-ci.yml

@@ -780,18 +780,18 @@ rollout 100%:
 
   function install_dependencies() {
     apk add -U openssl curl tar gzip bash ca-certificates git
-    curl -L -o /etc/apk/keys/sgerrand.rsa.pub https://alpine-pkgs.sgerrand.com/sgerrand.rsa.pub
-    curl -L -O https://github.com/sgerrand/alpine-pkg-glibc/releases/download/2.28-r0/glibc-2.28-r0.apk
+    curl -sSL -o /etc/apk/keys/sgerrand.rsa.pub https://alpine-pkgs.sgerrand.com/sgerrand.rsa.pub
+    curl -sSL -O https://github.com/sgerrand/alpine-pkg-glibc/releases/download/2.28-r0/glibc-2.28-r0.apk
     apk add glibc-2.28-r0.apk
     rm glibc-2.28-r0.apk
 
-    curl "https://kubernetes-helm.storage.googleapis.com/helm-v${HELM_VERSION}-linux-amd64.tar.gz" | tar zx
+    curl -sS "https://kubernetes-helm.storage.googleapis.com/helm-v${HELM_VERSION}-linux-amd64.tar.gz" | tar zx
     mv linux-amd64/helm /usr/bin/
     mv linux-amd64/tiller /usr/bin/
     helm version --client
     tiller -version
 
-    curl -L -o /usr/bin/kubectl "https://storage.googleapis.com/kubernetes-release/release/v${KUBERNETES_VERSION}/bin/linux/amd64/kubectl"
+    curl -sSL -o /usr/bin/kubectl "https://storage.googleapis.com/kubernetes-release/release/v${KUBERNETES_VERSION}/bin/linux/amd64/kubectl"
     chmod +x /usr/bin/kubectl
     kubectl version --client
   }