Updated Camera, CameraData and Renderer to use Warp instead of Torch

[daniela-hase]

Description

• Migrated camera sensor outputs, pose/frame state, intrinsics, and renderer buffer contracts from Torch tensors to wp.array.
• Updated Isaac RTX, OVRTX, and Newton Warp renderers to consume/write Warp-backed camera buffers, including preserving rgb behavior when rgba is also requested.
• Updated downstream observations, tasks, demos, tutorials, docs, and tests to use warp.to_torch where Torch operations are still required.
• Extended camera tests and math orientation-conversion tests to validate wp.array dtypes and zero-copy Torch views.

Type of change

• API change

Checklist

• I have read and understood the contribution guidelines
• I have run the pre-commit checks with ./isaaclab.sh --format
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• I have updated the changelog and the corresponding version in the extension's config/extension.toml file
• I have added my name to the CONTRIBUTORS.md or my name already exists there