Add administration package to Key Vault pipeline (#13631)

Author: chlowell

sdk/keyvault/ci.yml

@@ -34,6 +34,8 @@ extends:
   parameters:
     ServiceDirectory: keyvault
     Artifacts:
+    - name: azure_keyvault_administration
+      safename: azurekeyvaultadministration
     - name: azure_keyvault_certificates
       safeName: azurekeyvaultcertificates
     - name: azure_keyvault_keys