test: fix failing tests and API (#5823)

* tests: fix failing tests

* fix selection.test.tsx

* fix excalidraw.test.tsx and don't show image export when SaveAsImage is false in UIOptions.canvasActions

* more fixes

* require fake index db in setUp test to fix the tests

* fix regression

src/tests/test-utils.ts

@@ -16,8 +16,6 @@ import { SceneData } from "../types";
 import { getSelectedElements } from "../scene/selection";
 import { ExcalidrawElement } from "../element/types";
 
-require("fake-indexeddb/auto");
-
 const customQueries = {
   ...queries,
   ...toolQueries,