Add showsVerticalScrollIndicator in ScrollViewProps.cpp SetProp (#50798)

Summary:
https://github.com/facebook/react-native/blob/a3252def1990c0d0afba67a4698357bc91c5bb2a/packages/react-native/ReactCommon/react/renderer/components/scrollview/ScrollViewProps.cpp#L409

Need to add     `RAW_SET_PROP_SWITCH_CASE_BASIC(showsVerticalScrollIndicator);` as it's missing

Related PR: microsoft/react-native-windows#14526
Resolves: #50779

## Changelog:

Add showsVerticalScrollIndicator in ScrollViewProps.cpp SetProp

Pick one each for the category and type tags:

[GENERAL] [ADDED] - Message

Windows : RNW

Pull Request resolved: #50798

Test Plan: Tested here: Related PR: microsoft/react-native-windows#14526

Reviewed By: Abbondanzo

Differential Revision: D73291101

Pulled By: NickGerleman

fbshipit-source-id: 6db26d379d496c0652917cc326dfbcbd92dc3923

Author: anupriya13

packages/react-native/ReactCommon/react/renderer/components/scrollview/ScrollViewProps.cpp

@@ -407,6 +407,7 @@ void ScrollViewProps::setProp(
     RAW_SET_PROP_SWITCH_CASE_BASIC(pinchGestureEnabled);
     RAW_SET_PROP_SWITCH_CASE_BASIC(scrollsToTop);
     RAW_SET_PROP_SWITCH_CASE_BASIC(showsHorizontalScrollIndicator);
+    RAW_SET_PROP_SWITCH_CASE_BASIC(showsVerticalScrollIndicator);
     RAW_SET_PROP_SWITCH_CASE_BASIC(persistentScrollbar);
     RAW_SET_PROP_SWITCH_CASE_BASIC(horizontal);
     RAW_SET_PROP_SWITCH_CASE_BASIC(scrollEventThrottle);