CodeGen from PR 23623 in Azure/azure-rest-api-specs

add constraint for servername (#23623)

* add constraint for servername

* fix model validation

* update 2022-01-01 for servernameparameter

* unify servernameparameter for 2021-12-01-preview

Author: SDKAuto

schemas/2021-12-01-preview/Microsoft.DBforMySQL.json

@@ -29,7 +29,15 @@
           "description": "The geo-location where the resource lives"
         },
         "name": {
-          "type": "string",
+          "oneOf": [
+            {
+              "type": "string",
+              "pattern": "^[a-z0-9][-a-z0-9]*(?<!-)$"
+            },
+            {
+              "$ref": "https://schema.management.azure.com/schemas/common/definitions.json#/definitions/expression"
+            }
+          ],
           "description": "The name of the server."
         },
         "properties": {
@@ -1003,6 +1011,21 @@
           ],
           "description": "Storage IOPS for a server."
         },
+        "logOnDisk": {
+          "oneOf": [
+            {
+              "type": "string",
+              "enum": [
+                "Enabled",
+                "Disabled"
+              ]
+            },
+            {
+              "$ref": "https://schema.management.azure.com/schemas/common/definitions.json#/definitions/expression"
+            }
+          ],
+          "description": "Enable Log On Disk or not."
+        },
         "storageSizeGB": {
           "oneOf": [
             {

schemas/2022-01-01/Microsoft.DBforMySQL.json

@@ -1059,6 +1059,21 @@
           ],
           "description": "Storage IOPS for a server."
         },
+        "logOnDisk": {
+          "oneOf": [
+            {
+              "type": "string",
+              "enum": [
+                "Enabled",
+                "Disabled"
+              ]
+            },
+            {
+              "$ref": "https://schema.management.azure.com/schemas/common/definitions.json#/definitions/expression"
+            }
+          ],
+          "description": "Enable Log On Disk or not."
+        },
         "storageSizeGB": {
           "oneOf": [
             {