Use GCC 13 in CUDA 12 conda builds.

[bdice]

Description

conda-forge is using GCC 13 for CUDA 12 builds. This PR updates CUDA 12 conda builds to use GCC 13, for alignment.

These PRs should be merged in a specific order, see rapidsai/build-planning#129 for details.

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[jameslamb]

Approving the packaging changes, assuming the fix for this build issue will be small and/or reviewed by C++ codeowners:

/opt/conda/conda-bld/work/cpp/src/neighbors/detail/dynamic_batching.cuh: In constructor 'constexpr cuvs::neighbors::dynamic_batching::detail::batch_token::batch_token(uint32_t)':
/opt/conda/conda-bld/work/cpp/src/neighbors/detail/dynamic_batching.cuh:242:62: error: call to non-'constexpr' function 'uint32_t& cuvs::neighbors::dynamic_batching::detail::batch_token::id()' [-Werror=invalid-constexpr]
  242 |   explicit constexpr inline batch_token(uint32_t buffer_id) { id() = buffer_id; }
      |                                                      ~~~~~~~~^~
/opt/conda/conda-bld/work/cpp/src/neighbors/detail/dynamic_batching.cuh:258:1: note: 'uint32_t& cuvs::neighbors::dynamic_batching::detail::batch_token::id()' declared here
  258 |   RAFT_INLINE_FUNCTION auto id() noexcept -> uint32_t&
      | ^ 

(build link)