[iOS] Fix LegacyPressable not emitting onPressOut (#4121)

## Description

Fixes the `LegacyPressable` on iOS getting stuck due to an unhandled
`NATIVE_START` event. Updates the non-legacy implementation to also
dispatch the `NATIVE_START`, which is now expected by the state machine.

## Test plan

|Before|After|
|-|-|
|<video
src="https://github.com/user-attachments/assets/7e7476f1-0d61-40d9-9c13-4f157b050bb6"
/>|<video
src="https://github.com/user-attachments/assets/11e3b42b-e9b9-4b4f-a8cb-6dc9f20e2001"
/>|

Author: j-piasecki

packages/react-native-gesture-handler/src/components/Pressable/stateDefinitions.ts

@@ -61,6 +61,9 @@ function getIosStatesConfig(
       eventName: StateMachineEvent.NATIVE_BEGIN,
       callback: handlePressIn,
     },
+    {
+      eventName: StateMachineEvent.NATIVE_START,
+    },
     {
       eventName: StateMachineEvent.FINALIZE,
       callback: handlePressOut,

packages/react-native-gesture-handler/src/v3/components/Pressable.tsx

@@ -308,7 +308,7 @@ const Pressable = (props: PressableProps) => {
       stateMachine.handleEvent(StateMachineEvent.NATIVE_BEGIN);
     },
     onActivate: () => {
-      if (Platform.OS !== 'android' && Platform.OS !== 'ios') {
+      if (Platform.OS !== 'android') {
         // Native.onActivate is broken with Android + hitSlop
         stateMachine.handleEvent(StateMachineEvent.NATIVE_START);
       }