feat(middlewared/system): implement system.general.ui_certificate_cho…

…ices

Ticket:	#76594

src/middlewared/middlewared/plugins/system.py

@@ -820,6 +820,18 @@ async def validate_general_settings(self, data, schema):
 
         return verrors
 
+    @accepts()
+    async def ui_certificate_choices(self):
+        """
+        Return choices of `ui_certificate` attribute for `system.general.update`.
+        """
+        return {
+            i['id']: i['name']
+            for i in await self.middleware.call('certificate.query', [
+                ('cert_type_CSR', '=', False)
+            ])
+        }
+
     @accepts(
         Dict(
             'general_settings',