Fix assert Turbo Module example crash the app when tap Run all tests (#44607)

Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/44607

Same as https://github.com/facebook/react-native/pull/41521?fbclid=IwAR1X3qRAyVCZIy2w2T7tmqd1FYVCqrT2TyO-gszIgJ0XKN6F60ODkq_K3nI for the Java / ObjC Turbo Module example.

Changelog: [INTERNAL] [FIXED] - [RN-Tester] Fix assert Turbo Module example crash the app when tap `Run all tests`

Reviewed By: cortinico

Differential Revision: D57531736

fbshipit-source-id: 7cad5dfd31c306dff4763b67466664f2dde6b239

packages/rn-tester/js/examples/TurboModule/NativeCxxModuleExampleExample.js

@@ -38,6 +38,7 @@ type State = {|
 
 type Examples =
   | 'callback'
+  | 'callbackWithSubscription'
   | 'getArray'
   | 'getBool'
   | 'getConstants'
@@ -221,7 +222,7 @@ class NativeCxxModuleExampleExample extends React.Component<{||}, State> {
   };
 
   _setResult(
-    name: string | Examples,
+    name: Examples | ErrorExamples,
     result:
       | $FlowFixMe
       | void
@@ -271,6 +272,7 @@ class NativeCxxModuleExampleExample extends React.Component<{||}, State> {
             style={[styles.column, styles.button]}
             onPress={() =>
               Object.keys(this._tests).forEach(item =>
+                // $FlowFixMe
                 this._setResult(item, this._tests[item]()),
               )
             }>