feat(toast): add swipe to dismiss functionality (#28442)

Issue number: resolves #21769

---------

<!-- Please do not submit updates to dependencies unless it fixes an
issue. -->

<!-- Please try to limit your pull request to one type (bugfix, feature,
etc). Submit multiple pull requests if needed. -->

## What is the current behavior?
<!-- Please describe the current behavior that you are modifying. -->

Toast does not support swipe gestures to dismiss.

## What is the new behavior?
<!-- Please describe the behavior or changes that are being added by
this PR. -->

- Added a `swipeGesture` property that allows users to swipe toasts
closed.
Note: This is a combination of previous PRs
https://github.com/ionic-team/ionic-framework/pull/28380 and
https://github.com/ionic-team/ionic-framework/pull/28402

⚠️ There is a visual glitch on iOS where dragging and having the toast
animate back to its opened position causes a flicker. This is an iOS 17
regression and is being tracked in
https://github.com/ionic-team/ionic-framework/issues/28467. This bug has
been reported to and confirmed by Apple.

## Does this introduce a breaking change?

- [ ] Yes
- [x] No

<!-- If this introduces a breaking change, please describe the impact
and migration path for existing applications below. -->


## Other information

<!-- Any other information that is important to this PR such as
screenshots of how the component looks before and after the change. -->

⚠️ Give co-author credit to author in
https://github.com/ionic-team/ionic-framework/pull/23124

---------

Co-authored-by: evgeniy-skakun <evgeniy-skakun@users.noreply.github.com>

core/src/utils/overlays.ts

@@ -685,6 +685,7 @@ export const safeCall = (handler: any, arg?: any) => {
 
 export const BACKDROP = 'backdrop';
 export const GESTURE = 'gesture';
+export const OVERLAY_GESTURE_PRIORITY = 39;
 
 /**
  * Creates a delegate controller.