[TIMOB-12479] iOS: Allow map annotation to fire a click event without showing the callout

   var win = Titanium.UI.createWindow();
   
   var mountainView = Titanium.Map.createAnnotation({
       latitude:37.390749,
       longitude:-122.081651,
       title:"Appcelerator Headquarters",
       subtitle:'Mountain View, CA',
       pincolor:Titanium.Map.ANNOTATION_RED,
       animate:true,
       leftButton: '../images/appcelerator_small.png',
       canShowCallout:false,
       myid:1 // Custom property to uniquely identify this annotation.
   });
   
   var mapview = Titanium.Map.createView({
       mapType: Titanium.Map.STANDARD_TYPE,
       region: {latitude:37.390749, longitude:-122.081651,
                latitudeDelta:0.01, longitudeDelta:0.01},
       animate:true,
       regionFit:true,
       userLocation:true,
       annotations:[mountainView]
   });
   
   win.add(mapview);
   // Handle click events on any annotations on this map.
   mapview.addEventListener('click', function(evt) {
   
       if (evt.clicksource == 'pin') {
           Ti.API.info('Got Click')
       }
   });
   win.open();