Chore: Enable useUnknownInCatchVariables for stricter type checking in catch blocks (#50591)

* wrap a bunch of errors

* wrap more things!

* fix up some unit tests

* wrap more errors

* tiny bit of tidy up

public/app/features/library-panels/components/AddLibraryPanelModal/AddLibraryPanelModal.tsx

@@ -1,6 +1,7 @@
 import React, { useCallback, useEffect, useState } from 'react';
 import { useAsync, useDebounce } from 'react-use';
 
+import { isFetchError } from '@grafana/runtime';
 import { Button, Field, Input, Modal } from '@grafana/ui';
 import { FolderPicker } from 'app/core/components/Select/FolderPicker';
 
@@ -36,7 +37,9 @@ export const AddLibraryPanelContents = ({ panel, initialFolderId, onDismiss }: A
     try {
       return !(await getLibraryPanelByName(panelName)).some((lp) => lp.folderId === folderId);
     } catch (err) {
-      err.isHandled = true;
+      if (isFetchError(err)) {
+        err.isHandled = true;
+      }
       return true;
     } finally {
       setWaiting(false);

public/app/features/library-panels/utils/usePanelSave.ts

@@ -2,6 +2,7 @@ import { useEffect } from 'react';
 import { useDispatch } from 'react-redux';
 import useAsyncFn from 'react-use/lib/useAsyncFn';
 
+import { isFetchError } from '@grafana/runtime';
 import { notifyApp } from 'app/core/actions';
 import { PanelModel } from 'app/features/dashboard/state';
 
@@ -17,8 +18,11 @@ export const usePanelSave = () => {
     try {
       return await saveAndRefreshLibraryPanel(panel, folderId);
     } catch (err) {
-      err.isHandled = true;
-      throw new Error(err.data.message);
+      if (isFetchError(err)) {
+        err.isHandled = true;
+        throw new Error(err.data.message);
+      }
+      throw err;
     }
   }, []);