Disables backward pass compilation of warp kernels (#1222)

# Description

Many of the warp kernels don't need backward pass compilation. This MR
disables the computation of the backward passes within the kernels. This
should reduce the kernel compile times.

Reference:
https://nvidia.github.io/warp/configuration.html#kernel-settings

## Type of change

- Bug fix (non-breaking change which fixes an issue)

## Checklist

- [x] I have run the [`pre-commit` checks](https://pre-commit.com/) with
`./isaaclab.sh --format`
- [x] I have made corresponding changes to the documentation
- [x] 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
- [x] I have added my name to the `CONTRIBUTORS.md` or my name already
exists there

source/extensions/omni.isaac.lab/omni/isaac/lab/utils/warp/kernels.py

@@ -10,7 +10,7 @@ from typing import Any
 import warp as wp
 
 
-@wp.kernel
+@wp.kernel(enable_backward=False)
 def raycast_mesh_kernel(
     mesh: wp.uint64,
     ray_starts: wp.array(dtype=wp.vec3),
@@ -75,7 +75,7 @@ def raycast_mesh_kernel(
             ray_face_id[tid] = f
 
 
-@wp.kernel
+@wp.kernel(enable_backward=False)
 def reshape_tiled_image(
     tiled_image_buffer: Any,
     batched_image: Any,