Add token for cache download pipeline (#5615)

Co-authored-by: liuzhe <zhliu1@microsoft.com>

pipelines/templates/install-dependencies.yml

@@ -9,6 +9,16 @@ parameters:
   - noop
   - venv
 
+# variables set on VSO:
+#   sas_cache
+#
+# its value should be:
+#   sp=racw&st=2022-04-01T00:00:00Z&se=......
+#
+# how to re-generate:
+#   1. find the storage on azure portal: nni (resource group) -> nni (storage account) -> cache (container)
+#   2. settings - shared access tokens - generate sas token and url
+
 steps:
 - template: config-version.yml
   parameters:
@@ -33,7 +43,7 @@ steps:
 
 - script: |
     set -e
-    azcopy copy 'https://nni.blob.core.windows.net/cache/dependencies-${{ parameters.platform }}.zip' dependencies.zip
+    azcopy copy 'https://nni.blob.core.windows.net/cache/dependencies-${{ parameters.platform }}.zip?$(sas_cache)' dependencies.zip
     python test/vso_tools/unpack_dependencies.py dependencies.zip
     rm dependencies.zip
   displayName: (POSIX) Download cache
@@ -41,7 +51,7 @@ steps:
   continueOnError: true
 
 - powershell: |
-    azcopy copy 'https://nni.blob.core.windows.net/cache/dependencies-${{ parameters.platform }}.zip' dependencies.zip
+    azcopy copy 'https://nni.blob.core.windows.net/cache/dependencies-${{ parameters.platform }}.zip?$(sas_cache)' dependencies.zip
     python test/vso_tools/unpack_dependencies.py dependencies.zip
     Remove-Item dependencies.zip
   displayName: (Windows) Download cache