test(e2e): update to react-native 0.66.0-rc.4

Hopefully the last RC, should clean even more things up
RC1 worked already so this should be low risk

Author: mikehardy

tests/ios/Podfile

@@ -46,17 +46,18 @@ target 'testing' do
   post_install do |installer|
     react_native_post_install(installer)
 
-    # This is needed for Apple Silicon (M1) builds https://github.com/facebook/react-native/issues/31941
     installer.aggregate_targets.each do |aggregate_target|
       aggregate_target.user_project.native_targets.each do |target|
         target.build_configurations.each do |config|
-          config.build_settings['LIBRARY_SEARCH_PATHS'] = ['$(SDKROOT)/usr/lib/swift', '$(inherited)']
+          # Arch selection is needed to work across M1/Intel macs, became necessary when App Check was added
           config.build_settings['ONLY_ACTIVE_ARCH'] = 'YES'
           config.build_settings['EXCLUDED_ARCHS'] = 'i386'
         end
       end
       aggregate_target.user_project.save
     end
+
+    # This is needed until react-native gets transitive dependencies fixed
     __apply_Xcode_12_5_M1_post_install_workaround(installer)
   end
 end