[Fix#9923] The alarm instance management interface is always in the loading state (#9924)

* fix alert plugin loading bug

* update use-form.ts

* remove unused package

* Update use-form.ts

* Update use-form.ts

dolphinscheduler-ui/src/views/security/alarm-instance-manage/use-form.ts

@@ -72,12 +72,16 @@ export function useForm() {
   const getUiPluginsByType = async () => {
     if (state.pluginsLoading) return
     state.pluginsLoading = true
+    try {
       const plugins = await queryUiPluginsByType({ pluginType: 'ALERT' })
       state.uiPlugins = plugins.map((plugin: IPlugin) => ({
         label: plugin.pluginName,
         value: plugin.id
       }))
       state.pluginsLoading = false
+    } catch (e) {
+      state.pluginsLoading = false
+    }
   }
 
   const changePlugin = async (pluginId: IPluginId) => {