declare cuda-python dependency for wheels, other small packaging changes

[jameslamb]

Follow-up to #6190.

Proposes some miscellaneous packaging cleanup:

• declares cuml-cu{11,12} wheels' runtime dependency on cuda-python
  • as a result of stuff like this:

    cuml/python/cuml/cuml/svm/linear.pyx

    Lines 40 to 43 in bfd2e22

    	from cuda.ccudart cimport(
    	cudaMemcpyAsync,
    	cudaMemcpyKind,
    	)

• adds raft_log.txt to .gitignore
• adds CMake option CUML_USE_RAFT_STATIC
  • to provide a default for this:

    cuml/cpp/CMakeLists.txt

    Line 600 in bfd2e22

    if(CUML_USE_RAFT_STATIC AND (TARGET raft::raft))

• defines BUILD_CAGRA_HNSWLIB OFF in get_cuvs.cmake
  • as is done for RAFT:

    cuml/cpp/cmake/thirdparty/get_raft.cmake

    Line 58 in bfd2e22

    "BUILD_CAGRA_HNSWLIB OFF"

  • cuML doesn't need the CAGRA stuff from cuVS, as far as I can tell
  • this is ON by default in cuVS, so this change saves a bit of build time and size: https://github.com/rapidsai/cuvs/blob/1e548f8c3a773452ce69556f4db72fc712efae02/cpp/CMakeLists.txt#L58
• explicitly passing package type to rapids-download-wheels-from-s3 in CI scripts

Notes for Reviewers

These changes are useful independently, but will also make the libcuml wheels PR (#6199) a bit smaller and easier to review.

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[jameslamb]

/ok to test