Generate .NET SDK for planetarycomputer using new management generator. (Azure#37751)

* Generate .NET SDK for planetarycomputer using new management generator.

* update tspconfig.yaml.

Author: haiyuazhang

specification/orbitalplanetarycomputer/Orbital.Management/tspconfig.yaml

@@ -9,12 +9,6 @@ options:
     emitter-output-dir: "{project-root}/.."
     output-file: "{azure-resource-provider-folder}/Microsoft.Orbital/{version-status}/{version}/planetarycomputer.json"
     use-read-only-status-schema: true
-  "@azure-tools/typespec-csharp":
-    emitter-output-dir: "{output-dir}/{service-dir}/{namespace}"
-    flavor: azure
-    clear-output-folder: true
-    model-namespace: true
-    namespace: "Azure.ResourceManager.PlanetaryComputer"
   "@azure-tools/typespec-python":
     emitter-output-dir: "{output-dir}/{service-dir}/azure-mgmt-planetarycomputer"
     namespace: "azure.mgmt.planetarycomputer"
@@ -43,6 +37,9 @@ options:
     generate-fakes: true
     head-as-boolean: true
     inject-spans: true
+  "@azure-typespec/http-client-csharp-mgmt":
+    namespace: "Azure.ResourceManager.PlanetaryComputer"
+    emitter-output-dir: "{output-dir}/{service-dir}/{namespace}"
 linter:
   extends:
     - "@azure-tools/typespec-azure-rulesets/resource-manager"