Add Suspense tests for Animation Backend (#56121)

Summary:
Pull Request resolved: #56121

Add integration tests to verify that native-driven animations continue running correctly through Suspense transitions and react-freeze cycles.

These tests ensure animation state is preserved when components are suspended, frozen/unfrozen, or undergo multiple freeze cycles — catching regressions in the Animation Backend's interaction with React's concurrent features.

## Changelog:
[General] [Added] - Suspense tests for the Animation Backend

Reviewed By: zeyap

Differential Revision: D96910964

fbshipit-source-id: af872bba14b5aeafaeae00e9c92d4f31cdc3124e

Author: Bartlomiej Bloniarz