{Compute} az sig image-definition: Migrate commands using Code Gen V2 (#30576)

Author: yanzhudd

src/azure-cli/azure/cli/command_modules/vm/_help.py

@@ -843,24 +843,6 @@
         --location myLocation --shared-to tenant
 """
 
-helps['sig image-definition update'] = """
-type: command
-short-summary: Update a VM Image definition.
-examples:
-  - name: Change the shared image definition's recommended configuration
-    text: |-
-        az sig image-definition update --resource-group MyResourceGroup \\
-        --gallery-name MyGallery --gallery-image-definition MyImage \\
-        --resource-group MyResourceGroup --set recommended.vCpUs.min=myNewvCpUsMin \\
-        recommended.vCpUs.max=myNewvCpUsMax recommended.memory.min=myNewMemoryMin \\
-        recommended.memory.max=myNewMemoryMax description="newDescription"
-  - name: Remove a shared image definition's configuration property
-    text: |-
-        az sig image-definition update --resource-group MyResourceGroup \\
-        --gallery-name MyGallery --gallery-image-definition MyImage \\
-        --resource-group MyResourceGroup --remove recommended.vCpUs.min
-"""
-
 helps['sig image-definition list-community'] = """
 type: command
 short-summary: List VM Image definitions in a gallery community

src/azure-cli/azure/cli/command_modules/vm/aaz/latest/sig/image_definition/__init__.py

@@ -9,8 +9,11 @@
 # flake8: noqa
 
 from .__cmd_group import *
+from ._create import *
 from ._delete import *
 from ._list import *
 from ._show import *
+from ._show_community import *
 from ._show_shared import *
+from ._update import *
 from ._wait import *