Use rapids_cpm_nvtx3 to get same nvtx3 target state as rmm

[robertmaynard]

Description

We need to use the rapids_cpm_nvtx3 so that the nvtx3 targets, and setup are consistent across rmm and cudf. If we don't we get errors around incorrect exports when building statically or link errors when building shared.

Checklist

• [x] I am familiar with the Contributing Guidelines.
• [x] New or existing tests cover these changes.
• [x] The documentation is up to date with these changes.

[robertmaynard]

Blocked by https://github.com/rapidsai/rapids-cmake/pull/617

[robertmaynard]

/merge