[amg] Remove essential SKU resource creation (#9128)

* Remove essential SKU resource creation

* Refine arg error msg

* Remove essential SKU resource creation

* Refine arg error msg

* New test recordings

* Redo test recordings

---------

Co-authored-by: Alan Zhang <alanzhang@microsoft.com>

Author: ABZhang0

src/amg/HISTORY.rst

@@ -151,4 +151,8 @@ Release History
 * `az grafana folder create`: support parent folder argument for nested folder creation
 * `az grafana folder list`: support nested folders
 * `az grafana folder show`: support nested folders
-* `az grafana backup`: include corresponding nested folders when individual folders are specified
+* `az grafana backup`: include corresponding nested folders when individual folders are specified
+
+2.8.1
+++++++
+* `az grafana create`: block creation for resources of Essential SKU tier

src/amg/azext_amg/custom.py

@@ -62,6 +62,13 @@ def pre_operations(self):
         if not args.skip_system_assigned_identity:
             args.identity = {"type": "SystemAssigned"}
 
+        if args.sku_tier and str(args.sku_tier).lower() == "essential":
+            raise ArgumentUsageError(
+                "Creation of Grafana resources with the 'Essential' SKU tier is not supported. "
+                "Supported SKU tiers are: 'Standard'. "
+                "Please specify a supported SKU tier using the '--sku-tier' parameter."
+            )
+
     # override the output method to create role assignments after instance creation
     def _output(self, *args, **kwargs):
         from azure.cli.core.commands.arm import resolve_role_id

src/amg/azext_amg/tests/latest/recordings/test_amg_backup_restore.yaml

@@ -16,7 +16,7 @@
 
 # TODO: Confirm this is the right version number you want and it matches your
 # HISTORY.rst entry.
-VERSION = '2.8.0'
+VERSION = '2.8.1'
 
 # The full list of classifiers is available at
 # https://pypi.python.org/pypi?%3Aaction=list_classifiers