fix(angular): export RefresherPullEnd types (#30991)

Issue number: internal

---------

## What is the current behavior?
Currently, the 8.8 refresher events are not exported to Angular

## What is the new behavior?
With this change, we export the new events and also add Angular tests to
validate that they work and will continue working in the future.

## Does this introduce a breaking change?

- [ ] Yes
- [X] No

core/src/components.d.ts

@@ -8046,7 +8046,7 @@ declare namespace LocalJSX {
          */
         "onIonRefresh"?: (event: IonRefresherCustomEvent<RefresherEventDetail>) => void;
         /**
-          * Emitted when the user begins to start pulling down. TODO(FW-7044): Remove this in a major release
+          * Emitted when the user begins to start pulling down.
           * @deprecated Use `ionPullStart` instead.
          */
         "onIonStart"?: (event: IonRefresherCustomEvent<void>) => void;

core/src/components/refresher/refresher.tsx

@@ -141,9 +141,9 @@ export class Refresher implements ComponentInterface {
    */
   @Event() ionPull!: EventEmitter<void>;
 
+  // TODO(FW-7044): Remove this in a major release
   /**
    * Emitted when the user begins to start pulling down.
-   * TODO(FW-7044): Remove this in a major release
    *
    * @deprecated Use `ionPullStart` instead.
    */