Expand RNTester native interop Maestro coverage (#58444)

Summary:

Add direct-deep-link Maestro coverage for RNTester native interop scenarios and expand the legacy native module flow to validate its platform-specific result set. Make deep-link flows reliable by cold-starting their first route, acknowledging the iOS system confirmation, waiting for route-specific readiness, and using target-driven list scrolling. Extend the Maestro Cloud execution window for the expanded suite and exercise the intended native methods. Exclude the local screenshot-baseline flow from Maestro Cloud.

Differential Revision: D119484762

Author: cortinico

packages/rn-tester/.maestro/fabric-interop-add-children.yml

@@ -0,0 +1,28 @@
+appId: ${APP_ID} # iOS: com.meta.RNTester.localDevelopment | Android: com.facebook.react.uiapp
+---
+- launchApp
+- stopApp
+- runFlow:
+    when:
+      platform: iOS
+    commands:
+      - openLink: rntester://example/FabricInteropLayer/add-children
+      - runFlow: ./helpers/confirm-open-link.yml
+      - extendedWaitUntil:
+          visible: 'Add Marker'
+          timeout: 120000
+      - assertVisible:
+          id: 'marker_0'
+      - assertVisible:
+          id: 'marker_1'
+      - assertVisible:
+          id: 'marker_2'
+      - assertVisible:
+          id: 'marker_3'
+      - assertVisible:
+          id: 'marker_4'
+      - assertNotVisible:
+          id: 'marker_5'
+      - tapOn: 'Add Marker'
+      - assertVisible:
+          id: 'marker_5'