[Newton] Fixes cartpole camera env and updates mujoco version to match Newton

[kellyguo11]

Description

Minor fixes for the reset logic in the cartpole camera environment. Also updates the mujoco dependency to match the version in the Newton beta-1 build and removes unsupported rough terrain environment.

Updates the benchmark script to include new environments and perception environments.

Type of change

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

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