Updating ZoomableComponent allocator to create the litho views in the…

… background thread

Summary:
# Context
- Reels Tab Pinch to Zoom launch backtest has been regressing FVRE, Scroll perf along other metrics [[post]](https://fb.workplace.com/groups/119084311158843/permalink/451425104591427/)
- We are updating the component as per fbcbl recommendation in an attempt to mitigate these issues and fully launch the feature.

# What’s next
Public test targeting this update in v365.

Reviewed By: zielinskimz

Differential Revision: D68447468

fbshipit-source-id: e377f159411eab6d18fff2f1ba4c83d9d74037af

litho-zoomable/src/main/kotlin/com/facebook/litho/widget/zoomable/ZoomableComponent.kt

@@ -100,9 +100,8 @@ class ZoomableComponent(
   }
 
   companion object {
-    private val ALLOCATOR: ViewAllocator<LithoZoomableView> = ViewAllocator { context ->
-      LithoZoomableView(context)
-    }
+    private val ALLOCATOR: ViewAllocator<LithoZoomableView> =
+        ViewAllocator(canPreallocate = true, poolSize = 5) { context -> LithoZoomableView(context) }
   }
 }