Move stuff out of headers #14672

Job	Run time
checks / other-checks	1m 10s
checks / check-style	1m 47s
devcontainer / build (amd64, 12.5, conda)	2m 42s
devcontainer / build (amd64, 12.5, pip)	2m 39s
static-configure / build	45s
conda-cpp-build / compute-matrix	4s
wheel-build-cudf / compute-matrix	4s
conda-cpp-build / 11.8.0, 3.10, amd64, ubuntu22.04	43s
conda-cpp-build / 12.5.1, 3.10, amd64, ubuntu22.04	35s
conda-cpp-build / 11.8.0, 3.10, arm64, ubuntu22.04	40s
conda-cpp-build / 12.5.1, 3.10, arm64, ubuntu22.04	34s
wheel-build-cudf / 11.8.0, 3.9, amd64, rockylinux8	29s
wheel-build-cudf / 12.5.1, 3.9, amd64, rockylinux8	1s
wheel-build-cudf / 11.8.0, 3.10, amd64, rockylinux8	31s
wheel-build-cudf / 12.5.1, 3.10, amd64, rockylinux8	32s
wheel-build-cudf / 11.8.0, 3.11, amd64, rockylinux8	33s
wheel-build-cudf / 12.5.1, 3.11, amd64, rockylinux8	31s
wheel-build-cudf / 11.8.0, 3.9, arm64, rockylinux8	32s
wheel-build-cudf / 12.5.1, 3.9, arm64, rockylinux8	1s
wheel-build-cudf / 11.8.0, 3.10, arm64, rockylinux8	33s
wheel-build-cudf / 12.5.1, 3.10, arm64, rockylinux8	34s
wheel-build-cudf / 11.8.0, 3.11, arm64, rockylinux8	28s
wheel-build-cudf / 12.5.1, 3.11, arm64, rockylinux8	33s
wheel-tests-cudf	1s
unit-tests-cudf-pandas	1s
pandas-tests	1s
wheel-build-cudf-polars	1s
wheel-build-dask-cudf	1s
wheel-tests-cudf-polars	1s
wheel-tests-dask-cudf	1s
pandas-tests-diff	1s
conda-cpp-tests	1s
conda-python-build	1s
conda-java-tests	1s
conda-cpp-checks	1s
conda-notebook-tests	1s
conda-python-other-tests	1s
conda-python-cudf-tests	1s
docs-build	1s
pr-builder	1s
	17m 18s

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