Fix <Image> components not being able to be set as focusable for Voice Over

Summary:
Image component was missing an override which enables setting accessibility values and properties.

The main issue is the lack of this prevented Image component from being accessed by VoiceOver.

Changelog: [iOS][Fixed] - Fixed accessible prop no-opts on Image components

Reviewed By: joevilches

Differential Revision: D72410952

fbshipit-source-id: 5612205aca1710fe4bfed6132efeb59065ebf0b3

packages/react-native/React/Fabric/Mounting/ComponentViews/Image/RCTImageComponentView.mm

@@ -69,6 +69,11 @@ using namespace facebook::react;
   [super updateProps:props oldProps:oldProps];
 }
 
+- (NSObject *)accessibilityElement
+{
+  return _imageView;
+}
+
 - (void)updateState:(const State::Shared &)state oldState:(const State::Shared &)oldState
 {
   RCTAssert(state, @"`state` must not be null.");