use az to download storage blobs for custom builds

Signed-off-by: Jack Francis <jackfrancis@gmail.com>

templates/test/ci/prow-ci-version/patches/oot-credential-provider-kcp.yaml

@@ -9,11 +9,12 @@
       set -o errexit
       [[ $(id -u) != 0 ]] && SUDO="sudo" || SUDO=""
 
+      az login --identity
       echo "Use OOT credential provider"
       mkdir -p /var/lib/kubelet/credential-provider
-      curl --retry 10 --retry-delay 5 -w "response status code is %{http_code}" -Lo /var/lib/kubelet/credential-provider/acr-credential-provider "https://${AZURE_STORAGE_ACCOUNT}.blob.core.windows.net/${AZURE_BLOB_CONTAINER_NAME}/${IMAGE_TAG_ACR_CREDENTIAL_PROVIDER}/azure-acr-credential-provider"
+      az storage blob download --blob-url "https://${AZURE_STORAGE_ACCOUNT}.blob.core.windows.net/${AZURE_BLOB_CONTAINER_NAME}/${IMAGE_TAG_ACR_CREDENTIAL_PROVIDER}/azure-acr-credential-provider" -f /var/lib/kubelet/credential-provider/acr-credential-provider --auth-mode login
       chmod 755 /var/lib/kubelet/credential-provider/acr-credential-provider
-      curl --retry 10 --retry-delay 5 -w "response status code is %{http_code}" -Lo /var/lib/kubelet/credential-provider-config.yaml "https://${AZURE_STORAGE_ACCOUNT}.blob.core.windows.net/${AZURE_BLOB_CONTAINER_NAME}/${IMAGE_TAG_ACR_CREDENTIAL_PROVIDER}/credential-provider-config.yaml"
+      az storage blob download --blob-url "https://${AZURE_STORAGE_ACCOUNT}.blob.core.windows.net/${AZURE_BLOB_CONTAINER_NAME}/${IMAGE_TAG_ACR_CREDENTIAL_PROVIDER}/credential-provider-config.yaml" -f /var/lib/kubelet/credential-provider-config.yaml --auth-mode login
       chmod 644 /var/lib/kubelet/credential-provider-config.yaml
     path: /tmp/oot-cred-provider.sh
     owner: "root:root"
@@ -37,4 +38,4 @@
 - op: add
   path: /spec/kubeadmConfigSpec/joinConfiguration/nodeRegistration/kubeletExtraArgs/image-credential-provider-config
   value:
-    /var/lib/kubelet/credential-provider-config.yaml  
+    /var/lib/kubelet/credential-provider-config.yaml

templates/test/ci/prow-ci-version/patches/oot-credential-provider-win.yaml

@@ -4,11 +4,12 @@
     content: |
       $ErrorActionPreference = 'Stop'
 
+      az login --identity
       echo "Use OOT credential provider"
       mkdir C:\var\lib\kubelet\credential-provider
-      curl.exe --retry 10 --retry-delay 5 -L "https://${AZURE_STORAGE_ACCOUNT}.blob.core.windows.net/${AZURE_BLOB_CONTAINER_NAME}/${IMAGE_TAG_ACR_CREDENTIAL_PROVIDER}/azure-acr-credential-provider.exe" --output C:\var\lib\kubelet\credential-provider\acr-credential-provider.exe
+      az storage blob download --blob-url "https://${AZURE_STORAGE_ACCOUNT}.blob.core.windows.net/${AZURE_BLOB_CONTAINER_NAME}/${IMAGE_TAG_ACR_CREDENTIAL_PROVIDER}/azure-acr-credential-provider.exe" -f C:\var\lib\kubelet\credential-provider\acr-credential-provider.exe --auth-mode login
       cp C:\var\lib\kubelet\credential-provider\acr-credential-provider.exe C:\var\lib\kubelet\credential-provider\acr-credential-provider
-      curl.exe --retry 10 --retry-delay 5 -L "https://${AZURE_STORAGE_ACCOUNT}.blob.core.windows.net/${AZURE_BLOB_CONTAINER_NAME}/${IMAGE_TAG_ACR_CREDENTIAL_PROVIDER}/credential-provider-config-win.yaml" --output C:\var\lib\kubelet\credential-provider-config.yaml
+      az storage blob download --blob-url "https://${AZURE_STORAGE_ACCOUNT}.blob.core.windows.net/${AZURE_BLOB_CONTAINER_NAME}/${IMAGE_TAG_ACR_CREDENTIAL_PROVIDER}/credential-provider-config-win.yaml" -f C:\var\lib\kubelet\credential-provider-config.yaml --auth-mode login
     path: C:/oot-cred-provider.ps1
     permissions: "0744"
 - op: add
@@ -22,4 +23,4 @@
 - op: add
   path: /spec/template/spec/joinConfiguration/nodeRegistration/kubeletExtraArgs/image-credential-provider-config
   value:
-    /var/lib/kubelet/credential-provider-config.yaml  
+    /var/lib/kubelet/credential-provider-config.yaml