chore: Add onabort tests (#57431)

Summary:
Add test for `onabort` prop

## Changelog:

[INTERNAL] [ADDED] - Add `AbortSignal::onabort` test

Pull Request resolved: #57431

Test Plan:
```bash
yarn fantom abort-api/__tests__/AbortController-itest.js --watch
```

Reviewed By: javache

Differential Revision: D110787344

Pulled By: Abbondanzo

fbshipit-source-id: 1d9b02faa62d7ddb22fb3fccdf5efb6570b924f4

Author: retyui

packages/react-native/src/private/webapis/dom/abort-api/__tests__/AbortController-itest.js

@@ -86,6 +86,22 @@ describe('AbortController', () => {
     );
   });
 
+  describe("'onabort' prop", () => {
+    it('should call event lisnters in correct order', () => {
+      const listener = jest.fn();
+      const c = new AbortController();
+      c.signal.addEventListener('abort', () => listener(1));
+      c.signal.onabort = () => listener(2);
+      c.signal.addEventListener('abort', () => listener(3));
+
+      c.abort();
+
+      expect(listener).toHaveBeenNthCalledWith(1, 1);
+      expect(listener).toHaveBeenNthCalledWith(2, 2);
+      expect(listener).toHaveBeenNthCalledWith(3, 3);
+    });
+  });
+
   describe("'signal' property", () => {
     let signal: AbortSignal;