Update RAPIDS repos for RMM pool and detail API improvements

[harrism]

rapidsai/rmm#1417 and a followon PR makes a number of improvements and changes to help consumers of RMM avoid accessing RMM's detail namespace.

• initial pool size in pool_memory_resource is required to be provided (no longer optional)
• rmm::detail::available_device_memory() (moving to `rmm::available_device_memory())
• Move alignment utility functions out of detail namespace.
• Add utility to calculate an aligned percentage of free device memory in bytes. This way, existing instantiations of pool_memory_resource<Upstream>(upstream) can be replaced by pool_memory_resource<Upstream>(upstream, rmm::percent_of_free_device_memory(50), which matches previous behavior.

All RAPIDS repos that use any of the above will need to be updated. rapidsai/rmm#1417 only adds functionality. A follow on PR(s) will deprecate / remove functionality after RAPIDS repos are updated. Based on a search, the following repo issues cover the required changes.

Tasks

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1. [BUG] Update cuDF to always explicitly specify RMM pool size and avoid using rmm::detail APIs cudf#14658
   bug libcudf +2
   
2. [BUG] Update RAFT to always explicitly specify RMM pool size raft#2087
   bug +1
3. [BUG]: Update cuGraph to always explicitly specify RMM pool size and avoid using rmm::detail APIs cugraph#4066
   bug +1
   
4. [BUG]: Update cuSpatial to always explicitly specify RMM pool size and avoid using rmm::detail APIs cuspatial#1318
   improvement +1
   

[harrism]

Finished.