[DOC]: Fix contribution guides to point to the new cccl repo instead of the old ones

### Is this a duplicate?

- [X] I confirmed there appear to be no [duplicate issues](https://github.com/NVIDIA/cccl/issues) for this bug and that I agree to the [Code of Conduct](CODE_OF_CONDUCT.md)

### Is this for new documentation, or an update to existing docs?

Update

### Describe the incorrect/future/missing documentation

Our old contribution and setup guides often still use the old archived repos such as `https://github.com/NVIDIA/thrust.git`

We should most likely coalesce them all into aone unified CCCL howto

### If this is a correction, please provide a link to the incorrect documentation. If this is a new documentation request, please link to where you have looked.

_No response_