Revert "Revert "Merge from vscode ada4bddb8edc69eea6ebaaa0e88c5f903cbd43d8 (#5529)" (#5553)" (#5562)

This reverts commit c9a4f8f664.

build/azure-pipelines/distro-build.yml

@@ -10,13 +10,19 @@ steps:
   inputs:
     versionSpec: "10.15.1"
 
+- task: AzureKeyVault@1
+  displayName: 'Azure Key Vault: Get Secrets'
+  inputs:
+    azureSubscription: 'vscode-builds-subscription'
+    KeyVaultName: vscode
+
 - script: |
     set -e
 
     cat << EOF > ~/.netrc
     machine github.com
     login vscode
-    password $(VSCODE_MIXIN_PASSWORD)
+    password $(github-distro-mixin-password)
     EOF
 
     git config user.email "vscode@microsoft.com"