[Azure] Fix docker login on Azure (#3831)

* Fix Azure docker login

* fix logging

sky/provision/azure/config.py

@@ -84,7 +84,7 @@ def bootstrap_instances(
                     logger.info(
                         f'Azure resource group {resource_group} of a recent '
                         f'terminated cluster {cluster_name_on_cloud} is being '
-                        'deleted. It can only be provisioned after it is fully'
+                        'deleted. It can only be provisioned after it is fully '
                         'deleted. Waiting...')
                 time.sleep(1)
                 retry += 1

sky/templates/azure-ray.yml.j2

@@ -17,6 +17,15 @@ docker:
     {%- for run_option in docker_run_options %}
     - {{run_option}}
     {%- endfor %}
+  {%- if docker_login_config is not none %}
+  docker_login_config:
+    username: |-
+      {{docker_login_config.username}}
+    password: |-
+      {{docker_login_config.password}}
+    server: |-
+      {{docker_login_config.server}}
+  {%- endif %}
 {%- endif %}
 
 provider:
@@ -28,15 +37,6 @@ provider:
   # instead of the cluster_name. This ensures that ray creates new instances
   # for different cluster_name.
   resource_group: {{resource_group}}
-{%- if docker_login_config is not none %}
-  # We put docker login config in provider section because ray's schema disabled
-  # additionalProperties for docker config.
-  # See: https://github.com/ray-project/ray/blob/d2fc4823126927b2c54f89ec72fa3d24b442e6a3/python/ray/autoscaler/ray-schema.json#L227
-  docker_login_config:
-    username: {{docker_login_config.username}}
-    password: {{docker_login_config.password}}
-    server: {{docker_login_config.server}}
-{%- endif %}
   # Keep (otherwise cannot reuse when re-provisioning).
   # teardown(terminate=True) will override this.
   cache_stopped_nodes: True