Import `AnyKeyFile`, as per Distributed changes #324

Job	Run time
checks / other-checks	57s
checks / check-style	1m 59s
wheel-build	57s
conda-python-build / compute-matrix	8s
conda-python-build / build (11.8.0, ubuntu22.04, amd64, 3.9)	4m 16s
conda-python-build / build (11.8.0, ubuntu22.04, arm64, 3.9)	3m 22s
conda-python-build / build (11.8.0, ubuntu22.04, amd64, 3.10)	4m 17s
conda-python-build / build (11.8.0, ubuntu22.04, arm64, 3.10)	3m 14s
conda-python-build / build (12.0.1, ubuntu22.04, amd64, 3.9)	4m 20s
conda-python-build / build (12.0.1, ubuntu22.04, arm64, 3.9)	3m 12s
conda-python-build / build (12.0.1, ubuntu22.04, amd64, 3.10)	4m 12s
conda-python-build / build (12.0.1, ubuntu22.04, arm64, 3.10)	3m 21s
conda-python-tests	0s
docs-build	0s
pr-builder	0s
	34m 15s

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