MPG migration - databasewacher (#38780)

* update tspconfig.yaml

* update tspconfig.yaml

* update client.tsp

* remove changes by accident.

Author: haiyuazhang

specification/databasewatcher/DatabaseWatcher.Management/client.tsp

@@ -58,6 +58,10 @@ using Microsoft.DatabaseWatcher;
   "DatabaseWatcherResourceProvisioningState",
   "csharp"
 );
+@@clientName(alertRuleCreationProperties,
+  "alertRuleCreationProperty",
+  "csharp"
+);
 @@alternateType(Datastore.kustoClusterUri, url, "csharp");
 @@alternateType(Datastore.kustoDataIngestionUri, url, "csharp");
 @@alternateType(Datastore.kustoManagementUrl, url, "csharp");

specification/databasewatcher/DatabaseWatcher.Management/tspconfig.yaml

@@ -10,11 +10,8 @@ options:
     emit-common-types-schema: "never"
     output-file: "{azure-resource-provider-folder}/{service-name}/{version-status}/{version}/Watcher.json"
     use-read-only-status-schema: true
-  "@azure-tools/typespec-csharp":
+  "@azure-typespec/http-client-csharp-mgmt":
     emitter-output-dir: "{output-dir}/{service-dir}/{namespace}"
-    clear-output-folder: true
-    flavor: azure
-    model-namespace: false
     namespace: "Azure.ResourceManager.DatabaseWatcher"
   "@azure-tools/typespec-python":
     flavor: azure