Update create_image_from_disk() to specify only the instance_name instead of the ful… (GoogleCloudPlatform#11112)

* implemented fix for instance name argument on create_image_from_disk()

* Revert "implemented fix for instance name argument on create_image_from_disk()"

This reverts commit 3b396bd.

* reimplemented create
_image_from_disk() fix

* regenerated snippet

Author: PaulFenton

compute/client_library/ingredients/images/create.py

@@ -64,8 +64,9 @@ def create_image_from_disk(
     disk = disk_client.get(project=project_id, zone=zone, disk=source_disk_name)
 
     for disk_user in disk.users:
+        instance_name = disk_user.split("/")[-1]
         instance = instance_client.get(
-            project=project_id, zone=zone, instance=disk_user
+            project=project_id, zone=zone, instance=instance_name
         )
         if instance.status in STOPPED_MACHINE_STATUS:
             continue

compute/client_library/snippets/images/create.py

@@ -118,8 +118,9 @@ def create_image_from_disk(
     disk = disk_client.get(project=project_id, zone=zone, disk=source_disk_name)
 
     for disk_user in disk.users:
+        instance_name = disk_user.split("/")[-1]
         instance = instance_client.get(
-            project=project_id, zone=zone, instance=disk_user
+            project=project_id, zone=zone, instance=instance_name
         )
         if instance.status in STOPPED_MACHINE_STATUS:
             continue