Add lifetime trace logs for `ucxx::BufferRequest` #190

Job	Run time
checks / check-style	2m 26s
checks / other-checks	41s
conda-cpp-build / compute-matrix	2s
conda-cpp-build / build (11.8.0, ubuntu22.04, amd64, 3.10)	7m 41s
conda-cpp-build / build (12.0.1, ubuntu22.04, amd64, 3.10)	7m 35s
conda-python-tests / compute-matrix	2s
conda-cpp-tests / compute-matrix	1s
conda-cpp-tests / tests (11.2.2, centos7, amd64, 3.9, v100, earliest)	12m 12s
conda-cpp-tests / tests (11.4.3, ubuntu20.04, amd64, 3.9, v100, latest)	12m 22s
conda-cpp-tests / tests (11.8.0, ubuntu22.04, amd64, 3.10, v100, latest)	12m 13s
conda-cpp-tests / tests (12.0.1, ubuntu22.04, amd64, 3.10, v100, latest)	12m 14s
conda-python-tests / tests (11.2.2, centos7, amd64, 3.9, v100, earliest)	33m 8s
conda-python-tests / tests (11.4.3, ubuntu20.04, amd64, 3.9, v100, latest)	35m 1s
conda-python-tests / tests (11.8.0, ubuntu22.04, amd64, 3.10, v100, latest)	35m 7s
conda-python-tests / tests (12.0.1, ubuntu22.04, amd64, 3.10, v100, latest)	35m 10s
pr-builder	0s
	3h 25m 55s

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