Add changelog fragment for OVPhysX SceneDataBackend

Bumps isaaclab_ovphysx by a minor tier. Describes the new
OvPhysxSceneDataBackend and OvPhysxManager.get_scene_data_backend
introduced in the previous commit and the per-binding/merged-buffer
strategy used to bridge the wheel's one-pattern-per-binding API to
the central SceneDataProvider.

Author: AntoineRichard

source/isaaclab_ovphysx/changelog.d/antoiner-feat-ovphysx-scene-data-backend.minor.rst

@@ -0,0 +1,16 @@
+Added
+^^^^^
+
+* Added :class:`~isaaclab_ovphysx.physics.OvPhysxSceneDataBackend` and
+  :meth:`~isaaclab_ovphysx.physics.OvPhysxManager.get_scene_data_backend`
+  so the central
+  :class:`~isaaclab.scene.scene_data_provider.SceneDataProvider`
+  (introduced in #5128) can expose OVPhysX rigid-body transforms to
+  Rerun, Viser, and the native Newton viewport. The backend creates one
+  ovphysx ``TT.RIGID_BODY_POSE`` binding per distinct env-wildcard
+  rigid-body prim path (cartpole produces 2 bindings, Allegro hand ~17,
+  each covering all envs), reads each binding into a pre-allocated
+  ``wp.float32`` staging buffer via ``TensorBinding.read(dst)``, and
+  concatenates the per-binding reads into a single ``wp.transformf``
+  merged buffer that the central provider consumes as
+  :class:`~isaaclab.physics.scene_data_backend.SceneDataFormat.Transform`.