Update CCCL version

[nirandaperera]

Description

This PR updates CCCL to the latest 3.4.0 pre-release commit.

Comparison of CCCL commits: NVIDIA/cccl@c5594eb...2685474

We specifically need these features/fixes for RAPIDS projects:

• fix constexpr portability issue in __basic_any NVIDIA/cccl#8353
• [libcu++] Add resource_cast and dynamic_resource_cast NVIDIA/cccl#8272
• Add non-template ref-to-value converting constructor to __basic_any NVIDIA/cccl#8320
• Fix pointer_traits specializations to use alias template for rebind NVIDIA/cccl#8486

Checklist

• I am familiar with the Contributing Guidelines.
• New or existing tests cover these changes.
• The documentation is up to date with these changes.
• The cmake-format.json is up to date with these changes.
• I have added new files under rapids-cmake/
  • I have added include guards (include_guard(GLOBAL))
  • I have added the associated docs/ rst file and update the api.rst

[robertmaynard]

We only adopt CCCL release branches, not main.

[bdice]

We only adopt CCCL release branches, not main.

We have been pinned to commits from main for several months, due to needing new features (for the RMM CCCL migration) and fixes (for Blackwell and other bugs) that aren't in release branches. I updated the PR description to reflect the fixes I have been tracking since the last bump in #996.

[bdice]

I'd like to wait to merge this until we land the RMM CCCL memory resource migration (starting merges tomorrow). That will come with a number of build breaking changes that are disruptive on their own. We can merge this after that migration settles.

[nirandaperera]

@bdice I think so.