Enables the new replicator functional API path for color and texture
randomization for Isaac Sim 5.0. For backwards compatibility with Isaac
Sim 4.5, we maintain the previous omni.graph code path for 4.5 use.

- New feature (non-breaking change which adds functionality)

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

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Signed-off-by: jiehanw <jiehanw@nvidia.com>
Co-authored-by: Kelly Guo <kellyg@nvidia.com>